The graph, in Fig. 12.4y shows the median is 66mm on a day and just a few years have a day with more than 100mm. The colours in Fig. 12.4y indicate which month the maximum value occurred, and indicate that it can be in any of the months of the rainy season[^53].
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As a second preliminary, Fig. 12.7c uses Climatic > Prepare > Climatic Summaries to show the seasonal totals. The summary data are in Fig. 12.7d.
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- {width=“2.008472222222222in” he ight=“3.5148261154855645in”} |
+ h |
+ |
The Climatic > PICSA > Rainfall Graph, Fig. 12.5e is then used to show the resulting data. This is in Fig. 12.7f, and shows the seasonal mean is just over 550mm.
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-{widt h=“2.2830610236220474in” height =“2.6302777777777777in”} |
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+ |
The start and end of the rains are two of the building blocks for the crops dialogue. Hence these are now found. They will usually already be available from earlier calculations, see Section 12.3, but are also shown here for completeness of this section.
@@ -1378,28 +1376,27 @@
- |
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+ |
Use Climatic > PICSA > Crops. For clarity the dialogue is shown twice. In Fig. 12.7k the top controls are completed with the data frame for the daily data, i.e. dodoma.
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Return to the Climatic > PICSA > Crops dialogue and specify planting dates from 1st December to mid-January as shown in Fig. 12.7o. There is also a range of crop water requirements, from 250 to 400mm) and crop durations from 75 to 120 days. At other sites crops with a greater water requirement and with longer season lengths could also be considered. For Dodoma, the initial graphs in Fig. 12.7b, 12.7f and 12.7j suggest the range of values given in Fig. 12.7o.
-The results, in the output window, are shown in Fig. 12.7p. They can be interpreted here, but for presentation they are copied into Excel or to Calc (in Open Office). Copied from Fig. 12.7p they can be pasted into Excel, using the Import wizard. The results are shown in Fig. 12.7r
+The results, in the output window, are shown in Fig. 12.7p. They can be interpreted here, but for presentation they are copied into Excel or to Calc (in Open Office). Copied from Fig. 12.7p they can be pasted into Excel, using the Import wizard. The results are shown in Fig. 12.7q
@@ -1455,18 +1451,18 @@
+Fig. 12.7q |
Fig. 12.7r |
-Fig. 12.7s |
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+ |
+ |
-In Excel it is convenient to express the risks as fractions over 10 years as is shown in Fig. 12.7s. The results are in Fig. 12.7t. From Fig. 12.7t we see that a 75 day crop that needed 250mm and planted in 1st December would be OK in 6 years out of 10. Later planting would slightly increase the chance of success.
+In Excel it is convenient to express the risks as fractions over 10 years as is shown in Fig. 12.7s. The results are in Fig. 12.7s. From Fig. 12.7t we see that a 75 day crop that needed 250mm and planted in 1st December would be OK in 6 years out of 10. Later planting would slightly increase the chance of success.
@@ -1474,14 +1470,14 @@
-Fig. 12.7t |
-Fig. 12.7u Find the planting probabilities |
+Fig. 12.7s |
+Fig. 12.7t Find the planting probabilities |
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+ |
+ |
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+Fig. 12.7u |
Fig. 12.7v |
-Fig. 12.7w |
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+ |
diff --git a/docs/Chapter_14_The_Seasonal_forecast.html b/docs/Chapter_14_The_Seasonal_forecast.html
index fb679da..75f8ae4 100644
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Now all that remains is to stack the data, Climatic > Tidy and Examine > Stack, as shown in Fig. 13.3g. The re4sulting data are in Fig.13.3h. There are now 126984 rows of data, i.e. 37 years from 52 * 66 = 3432 equally spaced locations.
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This can be repeated for further parts of Rwanda. We suggest that exporting the data from individual “blocks” of 24 or usually 36 stations for CPT, may enable separate local forecasts to be given?
Change the filter to choose 12 blocks over the country, possibly Lat6S = (1, 5, 9) and Lon6E = (1, 4, 7, 10).
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diff --git a/docs/Chapter_17_Circular_data_and_wind_roses.html b/docs/Chapter_17_Circular_data_and_wind_roses.html
index 6d60c69..225d566 100644
--- a/docs/Chapter_17_Circular_data_and_wind_roses.html
+++ b/docs/Chapter_17_Circular_data_and_wind_roses.html
@@ -306,8 +306,8 @@
- |
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@@ -331,20 +331,19 @@ Fig. 16.2a shows the data in R-Instat. The wind directions (column wind_dir) are in radians, i.e. they are an angle between 0 and 2pi (i.e. 2 * 3.14 = 6.28).
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@@ -374,20 +373,19 @@ The structure of the data is ignored initially, to concentrate on the new summary statistics for circular data. Graphs are discussed in Section 16.3. A preview, in Fig. 16.2e indicates the data are reasonably concentrated near zero. From the graph we expect a mean just above zero, i.e. perhaps North-North-East, (where East = pi/2 = 1.57 in radians) and a standard deviation that indicates a good level of concentration of the data. Thus, we don’t expect the circular mean to be as large as 2.36 radians, or 135 degrees, as shown in Fig. 16.2d
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-{ width=“2.557014435695538in” hei ght=“2.6285608048993874in”} |
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-It seems that nothing has happened. But now press the icon on the toolbar, Fig. 16.2i to confirm that the two variables are now defined as circular. Press to close the metadata window.
+It seems that nothing has happened. But now press the icon on the toolbar, Fig. 16.2i to confirm that the two variables are now defined as circular. Press to close the metadata window.
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-Prefer from R-Instat
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+ h |
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@@ -549,24 +545,19 @@ Hence get the mean each day and then analyse the resulting daily data. This is the circular mean, and uses the Prepare > Column: Reshape > Column Summaries as shown in Fig. 16.2m and Fig. 16.2n.
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+{width=“2.9925721784776904in height=”3.2901760717410324in”} |
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-![] (media/image872.png){wid th=“2.243173665791776in” heigh t=“2.243173665791776in”} |
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+ |
So return to the dialogue and click on the Histogram Options button to set the number of bins to 36, Fig. 16.3i. We make the histogram a little more colourful at the same time.
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-{width=“2.63702646544182in” h eight=“3.539001531058618in”} |
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+ h |
+ |
This is now ready to produce a circular plot. Return to the dialogue, use the Plot Options and the Y-axis tab, Fig. 16.3k. Set the axis limits for the y-axis as shown in Fig. 16.3k. Also press on the Coordinates tab in Fig. 16.3k and specify polar coordinates.
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-The new dialogue when ready |
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Now use the Prepare >Column: Define > Circular to set the wd variable as circular, Fig 16.4r.
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-Fig. 16.3u |
+Fig. 16.3y |
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+ |
@@ -885,21 +858,19 @@ Use Climatic > Describe > Wind Speed/Direction > Wind Rose, Fig. 16.4a. Ignore the Windrose Options to investigate the default results from the hourly data.
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diff --git a/docs/Chapter_19_Drought_Indices__SPI.html b/docs/Chapter_19_Drought_Indices__SPI.html
index 89362f1..c82e564 100644
--- a/docs/Chapter_19_Drought_Indices__SPI.html
+++ b/docs/Chapter_19_Drought_Indices__SPI.html
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@@ -342,20 +342,19 @@ To help with the interpretation Fig. 18.2f shows boxplots of the monthly data.
@@ -369,21 +368,19 @@ The calculations to produce the spi index is relatively complex. A distribution is fitted to the data and then the equivalents from the normal distribution are found. For the annual totals, the distribution is already close to normal, as is shown by the density plot in Fig. 18.2g. Then the normal distribution is used, as in Fig. 18.2h, where the value for 1928 is indicated. The results are then standardised, which just changes the x-axis in Fig. 18.2h to go from roughly -2 to + 2. In fig 18.2h -2 corresponds to a value of 1068 – 2 * 178.5 = 711mm. A value of 711mm has a probability of 1 year in 40 (probability of about 0.025) of occurring and represents a severe drought. (Most readers will remember the value of ± 1.96, i.e. about ± 2 that gives the 5% points from the standard normal distribution.)
@@ -399,7 +396,7 @@
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+ |
diff --git a/docs/Chapter_20_Climate_Normals.html b/docs/Chapter_20_Climate_Normals.html
index f226f0a..bb976d1 100644
--- a/docs/Chapter_20_Climate_Normals.html
+++ b/docs/Chapter_20_Climate_Normals.html
@@ -614,21 +614,19 @@ For these reasons, we claim the proposed threshold value of 0.85mm is a practical was of implementing the WMO ≥1mm threshold.
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The first 2 normals in Table 19.1a are the precipitation totals and the number of rain days. As preparation, calculate the rain days as shown in Fig. 19.2a. In Fig. 19.2a the 0.85mm threshold has been used, which we claimed above, is consistent with the WMO definition of rain ≥ 1mm. (Use 0.95mm is you don’t agree!)
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The first step uses the Climatic > Prepare > Climatic Summaries, as shown in Fig. 19.2c, to give the monthly rainfall totals for each year.
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The annual results, in Fig. 19.2p show the mean annual rainfall was 595mm from 43 rain days, of which, on average 7 days has 25mm or more. So, the mean rain per rain day was on average 14mm and about one rain day in six had 25mm or more. The largest ever daily rainfall was 113mm.
@@ -841,20 +836,19 @@ <
The results are in Fig. 19.2s. The first value simply confirms that the mean is the same, whichever way it is calculated. The lowest year had a total of 330mm and the highest was 864mm. The 20% point for the annual rainfall total was 487mm and the 80% point was 717mm.
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The guidelines in (World Meteorological Organization (WMO), 2017) depend on what type of parameter you are calculating, i.e. sum, mean, count or extreme.
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@@ -949,20 +942,19 @@ To handle this adjustment, use Climatic > Date > Use Date as shown in Fig. 19.3i. Just choose the check-box for Days in Month. The resulting column is also shown in Fig. 19.3h. Now use Prepare > Column: Calculate > Calculations and complete it as shown in Fig. 19.3j. The resulting variable is also shown in Fig. 19.3h.
@@ -974,17 +966,20 @@ In (World Meteorological Organization (WMO), 2017) the monthly (and annual) mean values of the (daily) Tmax, Tmin and Tmean are in the list of Principal normals, Table 19.1a, while the monthly extremes and the count of the number of days that Tmax exceeds 25˚C, 30˚C, 35˚C and 40˚C are listed as secondary. The only equivalent threshold for Tmin is the count less than 0˚C, which is rarely useful in Africa. In (Arguez, et al., 2012) the count less than 10˚C is used, see Table 19.1b and that may be more relevant.
There are missing values in the temperature record. The inventory in Fig. 19.1a indicated that there are not many missing values, but a more accurate check may be useful. One way again uses Climatic > Check Data > Inventory, as shown in Fig. 19.4a, but with a different layout of the data. The result is in Fig. 19.4b.
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diff --git a/docs/Chapter_2_More_Practice_with_RInstat.html b/docs/Chapter_2_More_Practice_with_RInstat.html
index a336b31..ce0ce70 100644
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@@ -313,20 +313,23 @@ From the opening screen in R-Instat, select File > Open From Library as shown in Fig. 2.2a. Choose Load From Instat Collection, Then Browse to the Climatic directory then to Zambia. Select the file called Moorings_July.rds to give the screen shown in Fig. 2.2b. Press Ok.
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-{ width=“2.430002187226597in” hei ght=“2.7552777777777777in”} |
+Climatic > Zambia > Moorings.RDS |
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@@ -334,20 +337,23 @@ Move to the second data frame as shown in Fig. 2.2c which shows the monthly totals. They are the total rainfall in mm and the total number of rain days. A rain day was defined as a day with more than 0.85mm[^1].
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+Describe > Specific > Boxplot |
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@@ -377,39 +386,42 @@ Boxplots are essentially a 5-number summary of the data, (with potential outliers also shown). The Prepare > Column: Reshape > Column Summaries, Fig. 2.2h, dialogue can provide the same summaries numerically.
Summarise both the monthly totals and the number of raindays, with the month as the factor, as shown in Fig. 2.2i. Then choose the Summaries button and complete the sub-dialogue as shown in Fig. 2.2j.
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@@ -437,21 +449,23 @@ With the summaries in a sensible order, they are now transferred to the results (output) window.
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+Right-click > Reorder column(s) |
+Right-click > Rename column(s) |
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- {width=“2.7121620734908136in” height=“2.720417760279965in”} |
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+Prepare > Data Frame > View Data |
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@@ -484,63 +501,61 @@ Some “housekeeping” is a preliminary. The 3rd data-frame is no longer needed. Right-click on the bottom tab a and choose the option to delete, Fig. 2.3a. The dialogue shown in Fig. 2.3b opens. Just press ok.
Use Prepare > Column: Reshape > Column Summaries and complete the dialogue and sub-dialogue as shown in Fig. 2.3c and Fig. 2.3d to produce the seasonal totals.
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The results are shown in Fig. 2.3 e after the steps explained below. First, notice in Fig. 2.3e that there were only 4 months in the first season, and the annual summary was therefore set to missing[^3].
@@ -548,20 +563,23 @@ Use Prepare > Column: Text > Transform, Fig. 2.3f. Complete the resulting dialogue, as shown in Fig. 2.3g, to give just the starting year of the season. The resulting variable is shown in Fig. 2.3e.
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-{ width=“2.003675634295713in” hei ght=“2.8906255468066493in”} |
+Prepare > Column: Text > Transform |
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@@ -571,39 +589,42 @@ Use Climatic > PICSA > Rainfall Graph. Complete as shown in Fig. 2.3i. Press the PICSA Options button and complete the Lines ab as shown in Fig. 2.3j to add (and label) a horizontal line for the mean.
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The resulting graph is shown in Fig 2.3k[^4]. Return to the dialogue and put raindays as the y-variable to give the results in Fig. 2.3l.
@@ -614,6 +635,24 @@ Return to the monthly data frame and filter to examine just those months. So, make sure you are on the monthly data. Right click as usual and choose Filter, Fig. 2.3m
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@@ -680,19 +723,19 @@ The new columns have added to the existing annual sheet. So, go straight to the PICSA Rainfall Graphs dialogue again. Choose the new variable for the November-December totals and press OK. The mean is now 286mm for the 2 months. Repeat for the number of rain days to give the graphs for the filtered data, see Fig. 2.3s and 2.3t.
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Once imported, right-click to change the name of the last column from time_date to Date, i.e. to the same name as in the station data, Fig. 2.4d[^5].
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diff --git a/docs/Chapter_3_Using_RInstat_effectively.html b/docs/Chapter_3_Using_RInstat_effectively.html
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-Fig. 3.2aThe toolbar and View menu |
+Fig. 3.2a The toolbar and View menu |
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Use the icon on the toolbar, (Fig. 3.2a) or View > Column Metadata to see the metadata currently associated with each open data frame. An example is in the top left in Fig. 3.2b.
+Use the icon on the toolbar, (Fig. 3.2a) or View > Column Metadata to see the metadata currently associated with each open data frame. An example is in the top left in Fig. 3.2b.
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Double-click in the graph, Fig, 3.3d to turn it blue. This also produces the popup menu and the graph can be copied to the clipboard.
-An alternative is shown in Fig. 3.3e. Click on graph icon in the toolbar to show the last graph in R’s viewer. This only shows a single graph, but the Window can be resized and, as shown in Fig. 3.3e, there are now many options to save the graph, or to copy it to the clipboard.
+An alternative is shown in Fig. 3.3e. Click on graph icon in the toolbar to show the last graph in R’s viewer. This only shows a single graph, but the Window can be resized and, as shown in Fig. 3.3e, there are now many options to save the graph, or to copy it to the clipboard.
This toolbar option is only for the most recent graph. The Describe > View Graph dialogue, Fig. 3.3f provides the option to view any of the saved graphs in this way[^13].
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The final two Windows in R-Instat are for the Log Window and the Script Window.
The R programming language is very powerful, but with a relatively steep learning curve. R-Instat gives easy access to a subset of R. However, a click-and-point system always has limitations. We consider here some options if these limitations are ever a constraint.
-The log file keeps a record of all the R-commands that have been issued during a session of R-Instat. Use the toolbar option , Fig. 3.2e, or View > Log Window to open the log file.
+The log file keeps a record of all the R-commands that have been issued during a session of R-Instat. Use the toolbar option , Fig. 3.2e, or View > Log Window to open the log file.
In the Log file, the right-click menu gives various options, Fig. 3.4a, including saving the log file. That action is the same as using File > Save As > Save Log As, shown earlier in Fig. 3.2c.
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@@ -486,40 +486,38 @@ The first example was previously prepared for the original Instat. It is 56 years of daily data from Samaru in Northern Nigeria. Use File > Open from Library. Choose Instat data, Browse to the Climatic directory, choose Original Climatic Guide Datasets. There untick the first option and choose the sheet called Samaru56, Fig. 4.4a.
The data are shown in Fig. 4.4b. They are from 1928 and each year is in a separate column. All columns are of length 366, in Fig. 4.4b, and there is a special code for February 29th in non-leap years.
@@ -527,20 +525,19 @@ Return to the dialogue in Fig. 4.4c, tick the option above to ignore data on invalid dates. Press Ok again.
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This adds a new column called yr, Fig. 4.4p.
Nearly there. Use Climatic > Tidy and Examine > Tidy Daily Data as shown in Fig. 4.4r. Earlier, in Fig. 4.4c, each year was in a column. Now each month is in its own column. Complete Fig. 4.4r as shown. As with the first run earlier (Fig. 4.4c) we first check on any errors, rather than simply ignoring them.
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Add a date column using Climatic > Dates > Make Date and complete the dialogue as shown in Fig. 4.7d.
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The data have been exported from a previous version of Climsoft (see Sections 1.6 and 4.5). They include a lot of station details but seem in exactly the right shape to make quick progress.
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Define a date column from Climatic > Dates > Make Date, Fig. 4.7k, and then check, with Climatic > Tidy and Examine > One Variable Summarise, as in Fig. 4.7e. All seems fine so far.
So, the last step. Use Climatic > Define Climatic Data as in Fig. 4.7l. Complete the year, month, day fields, as the names are not recognised automatically. Also, obs is the rain column.
-Finally check for uniqueness, Fig. 3.7m.
+Finally check for uniqueness, Fig. 4.7m.
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