Home » Images » Image_Graph » Bug #4522

[2005-06-03 18:20 UTC] sebhtml at users dot sourceforge dot net

Description:
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Look at the expected result and actual result. The automatic interval don 't work... I can't set it manually because all users have a max-min that is different... When I was using Image_Graph 0.3.0, the histograms were not working , but the automatic interval was working. I checked the code and it it not the same for the method Image_Graph_Axis::_calcLabelInterval()

--sebhtml

Reproduce code:
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The code to reproduce the bug is : http://www.spockcorgis.com/biologie/Correlation_plot.phps
(this is a class) and the code that use the class :
http://www.spockcorgis.com/biologie/time_vs_score_img.phps

Expected result:
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If I set manually the interval, it looks like this :
http://www.spockcorgis.com/biologie/time_vs_score_img2.png

Actual result:
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The actual result look like this : http://www.spockcorgis.com/biologie/time_vs_score_img.png

[2005-06-03 18:41 UTC] pear dot nosey at veggerby dot dk

Actually it works as designed (as far as I can see)... The only discrepancy is that I'd have said this thing was changed prior to 0.3.0, but I _do_ think it is the "culprit":

The "problem" lies in that the default x-axis is now not a linear scale axis but a category axis (i.e. the actual x-values are distributed equally in-order-of-dataset on the axis), this also means that auto-labelinterval calculations aren't used on the x-axis - all values are shows by default!

What you can do to remedy this is :

1) Make the graph use a linear x-axis as in the old days, by specifying the axis "types" as parameters on the plotarea constructor:

$Plotarea = new Image_Graph_Plotarea("axis", "axis");

2) Use setLabelInterval() on the x-axis, which leeds me to:

You should not access methods or attributes that are named starting with an _ (underscore) they are private (pseudo- since PHP4 has no method/attribute visibility). There is a method setLabelOptions() for accessing the _labelOptions attribute (not that it makes any difference in this case, but visibility is there for _me_ as a provider of the class to be able to always be certain of the class' inner state, which cannot be guaranteed if you fiddle with the private variables :))

Hope this helps you on your path...

regards
Jesper

[2005-06-03 21:03 UTC] sebhtml at yahoo dot ca

Thank you very much!!!!!!