Ordering of bars in histogram?

[magerlin]

I cannot figure out what determines the ordering of bars in a histogram.

With a text attribute as X field I would expect the bars to be shown in alphabetical order but that is not the case:

[ghtmtt]

can you please share the input data (also a small piece of it)?

[magerlin]

Sorry for my late reply – I have been on summer holiday.

Please find attached data and Qgis project as well as a PDF illustrating the problem.

The Layout in the project is an atlas and I want to make a histogram only for points inside the current atlas feature.

If I tick “Only use features in visible map” I get the expected sorting order of the bars in the histogram – but this is not the histogram I want to show.

With no ticks or tick in “Use only features inside atlas feature” I get another and for me not right sorting order.

I have tried adding starting letters a to d to the intervals (as shown in the PDF) but it did not make any difference.

Histogram.zip

[WilliamBelini]

Could it have an order column organize the data plot? I have the same problem. I create a Bar Plot with round numbers but when its plotting, the data order by the ID of attribute table (It create an order X axis based on the round number, but the color of the bar if I create a customization rampage color by the original number -decimal 0,000-, its color based on ID, so it don't have uniform transition colors).

[palight]

I really need also ordering the X-values for histogram. Is the PR order by expression soon merged ?

[WilliamBelini]

the solution: You need reorder the data table Id, by column, using MMQGIS. It will change the Id by the order you want. And the chart will plot correctly.