data export with x- and y-axis as log scale

[celentanos]

When I set x- and y-axis as log scale and try export data the program hangs. It seams to be an endless while loop in ExportValuesXOrY ExportXThetaValuesMergedFunctions::periodicLogGraph(...)
function.

[markummitchell]

Hello, I am wondering if you have a sample data file that triggers the problem. Sorry for the slow response

[celentanos]

https://yadi.sk/d/MPqkjXODey32gw this is the corresponding file.

I only made the changes in Coordinates- and in Export Format Settings (see figures below). Then I tried to export the data in csv format. But the program starts to hang (with 100% CPU load in an one thread) when the two axes are set to log and you click on the export settings.

[markummitchell]

Thanks. I am able to see the problem. This should be fixed quickly. After testing you can try out the fixed version - about 2 days.

[markummitchell]

There is a 64 bit Windows pre-release at https://ci.appveyor.com/project/markummitchell/engauge-digitizer/branch/master/job/tahk5voottucfy38/artifacts. You can extract that file using tools like 7zip or winzip.

[celentanos]

The program has no hangs more, but the values are not sampled at the specified intervals (see figure below). I have the interval from 0.25 to 2.0 (see figure below).

[markummitchell]

That is working as designed. The step factor in a log plot is multiplicative. So values greater than 1 are needed since the pattern is ymin, ymin * scale, ymin * scale^2, ..., ymax

The Export Settings dialog now disables the Ok button, and does not insert a series of points, when the step is less than one for log scale.

[celentanos]

Good, I did not know that. The program works as you described. So I will mark this issue as solved. Many thanks :)

[markummitchell]

Thanks for the input. This fix will help many people in the future