Simplification of chart data processing

[David Platten]

The JavaScript for chart series calculation / series population is very similar for the plots of average dose per study / acquisition protocol / request. It should be possible to reduce the code by writing a function that does the calculations. It may also be possible to simplify the code in views.py too.

[David Platten]

Simplified chart data processing by moving most work to functions. These functions are used by both CT and DX charts. References issue #351 and issue #332.

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[David Platten]

Corrected typo that was preventing a CT chart from working. References issue #351

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[David Platten]

The JavaScript has now been simplified for the CT and radiographic plots. It doesn't look so straight-forward for views.py, but I'll take another look at it.

[David Platten]

Updated series labels of average plots so that (mean) or (median) is added to the series labels when plotting both mean and median values. It's so good to be able to update the code in one place and know that all the charts of this type will be up-to-date with the change (thanks, issue #351). References issue #332 and issue #351.

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[David Platten]

The chart JavaScript has been greatly simplified by using a single function to update each type of chart. Updating the code of one of these functions enables all charts of that type to be updated.

[David Platten]

Simplified chart data processing by moving most work to functions. These functions are used by both CT and DX charts. References issue #351 and issue #332.

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[David Platten]

Corrected typo that was preventing a CT chart from working. References issue #351

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[David Platten]

Updated series labels of average plots so that (mean) or (median) is added to the series labels when plotting both mean and median values. It's so good to be able to update the code in one place and know that all the charts of this type will be up-to-date with the change (thanks, issue #351). References issue #332 and issue #351.

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[David Platten]

Moved calculations of data for radiographic average plots with histogram to a function. References issue #351

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[David Platten]

Radiographic plots over time now calculated using a function. References issue #351

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[David Platten]

CT plot over time now calculated using a function. References issue #351

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[David Platten]

Workload charts now use a function. Possibly all done now. References issue #351

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[David Platten]

Finishing touches to moving all chart calculations to functions. Every chart of a given type now uses the same function to calculate the required data, whether radiographic or CT. Will help if the routines need changing, or if new charts need to be added. Fixes issue #351.

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[David Platten]

moved chart calculation functions to a seperate file. References issue #351

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[David Platten]

Fixed bug with CTDI plotting. Also altered name of min and max DAP variables to be generic. References issue #351

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[David Platten]

Created single JavaScript function to create charts of average vs category. Will be able to use this single function for all charts of this type, meaning that lots of JavaScript files can be removed. To begin with, I've replaced the CTDI and DLP per acquisition protocol with the function. The rest to follow. References issue #351

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[David Platten]

Replaced the remaining CT charts of dose vs category with the new function. References issue #351

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[David Platten]

Using JavaScript functions for charts, rather than lots of individual files.

[David Platten]

Replaced all radiographic chart JavaScript files of average vs category with the new function. Amended CT use of the function to include new parameter. References issue #351

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[David Platten]

Purely reformatting: no functional changes. I've run PyCharm's auto-indent lines command on each file. References issue #351

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[David Platten]

Replaced all over-time plot JavaScript files with a single function. References issue #351

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[David Platten]

Replaced all frequency plot JavaScript files with a single function. References issue #351

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[David Platten]

Renamed the chart variable to a generic name. References issue #351

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[David Platten]

Replaced both workload plot JavaScript files with a single function. References issue #351

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[David Platten]

All chart JavaScript files are now generic functions, rather than plot-specific files.

[David Platten]

Updated change files. References issue #351

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[Ed McDonagh]

Merging chart simplification branch. Great job @dplatten! I'll test it properly after merging it in. Refs #351, #360

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