[Moose-dev] Re: Roassal histogram bars left shifted

Consider the example: -=-=-=-=-=-=-=-=-= g := RTGrapher new. ds := RTData new. ds barShape. ds points: #(1 2 3 -2). ds maxX: 10. g add: ds. g configureForBarCharts. g axisX numberOfLabels: 4; labelConversion: [ :value | value + 500 ]. g -=-=-=-=-=-=-=-=-= <Screenshot 2017-07-13 21.44.20.png> Does this solve your problem? Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. On Jul 13, 2017, at 7:22 PM, Hernán Morales Durand &lt;hernan.morales(a)gmail.com&gt; wrote: Hi Alex, Thank you for taking care of this issue. The problem is partially fixed. I saw you implemented self datasets do: #offsetForBarCharts. self minX: 0.5. self maxX: self getMaxNumberOfPoints. self axisX noTick. However, I want to display the ticks, so I borrowed the first 3 lines for my plot method : | bins minPoint g ds | bins := self groupedBySeqLengthDistribution: binNumber. minPoint := ((bins reject: #isEmpty) detectMin: #size) anyOne size. " Build diagram " g := RTGrapher new extent: 500 @ 200; minX: minPoint; withoutOrigin; yourself. ds := RTData new points: bins; x: [ : c | c ifEmpty: [ minPoint ] ifNotEmpty: [ : d | d anyOne size ] ]; y: #size. ds barShape borderColor: Color black; color: aColor; width: barWidth. g add: ds. " Configure axis settings " g axisY title: axixYLabel; color: Color black; noDecimal. g axisX noDecimal; fromPoint: minPoint; color: Color black; title: axisXLabel. g datasets do: #offsetForBarCharts. g minX: 0. g maxX: g getMaxNumberOfPoints. " Open visualization in a new window " g open. Now the shift problem is fixed, but I lost the sequence lengths in the X axis. Please see the two attached screenshots. Cheers, Hernán 2017-07-09 5:20 GMT-03:00 Alexandre Bergel &lt;alexandre.bergel(a)me.com&gt;om>: Hi Hernán, Sorry to reply to late. Can you update Roassal and try: -=-=-=-=-=-=-=-=-= g := RTGrapher new. ds := RTData new. ds barShape. ds points: #(1 2 3 -2). ds maxX: 10. g add: ds. g configureForBarCharts. g -=-=-=-=-=-=-=-=-= The call configureforBarCharts should do what you expect. Cheers, Alexandre <Screenshot 2017-07-09 10.20.26.png> -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. On Jun 16, 2017, at 4:35 PM, Hernán Morales Durand &lt;hernan.morales(a)gmail.com&gt; wrote: Hi Alex I attached another screenshot which describes exactly the problem. 2017-06-16 10:40 GMT-03:00 Alexandre Bergel &lt;alexandre.bergel(a)me.com&gt;om>: Hi Hernán, I am not sure what exactly is the problematic situation you describe. Why you cannot simply with with #minX: and #maxX: ? My script actually sets minX: but it is wrongly drawn in the histogram For example, I tried to reuse the code you have provided. I can have: bins := #(#(1 1 1 1 ) #(2 2 2) #(5 5 5 5 5)). minPoint := ((bins reject: #isEmpty) detectMin: [ : c | c size ]) anyOne. " Build diagram " g := RTGrapher new extent: 500 @ 200; minX: 0; maxX: 6; withoutOrigin; yourself. ds := RTData new points: bins; x: [ : c | c ifEmpty: [ minPoint ] ifNotEmpty: [ : d | d anyOne ] ]; y: #size. ds barShape borderColor: Color black; color: Color red trans; width: 30. g add: ds. g <Screenshot 2017-06-16 09.39.25.png> But you can have "minX: 1", which in that case, the first bar is above the Y-Axis. This is what one would expect. The problem is not positioning the bars above the Y-Axis, but positioning them in the X-Axis. Which rendering do you wish to have? Can you provide a self-contained piece of code that I can run on my machine? If you have some time you could install BioSmalltalk in Pharo 5 (I haven't tested Pharo 6 yet) and evaluate the problematic expression: Metacello new smalltalkhubUser: 'hernan' project: 'BioSmalltalk'; configuration: 'BioSmalltalk'; version: #bleedingEdge; load (BioParser parseMultiFastaFile: BioObject testFilesDirectoryName asFileReference / 'ls_orchid.fasta') plotHistogramBins: 20 xAxisLabel: 'Sequence lengths (bp)' yAxisLabel: 'Count' color: Color red Cheers, Hernán Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. On Jun 15, 2017, at 1:16 AM, Hernán Morales Durand &lt;hernan.morales(a)gmail.com&gt; wrote: Hi guys, I am experiencing a problem visualizing histograms in Roassal with Pharo 5. In the attached image you can observe the first bar shape starts from a negative X axis value, where I want to start from 0. Besides, some bars are gapped but I don't know why. I am using with the following code: | bins minPoint g ds | bins := self groupedBySeqLengthDistribution: binNumber. minPoint := ((bins reject: #isEmpty) detectMin: [ : c | c size ]) anyOne size. " Build diagram " g := RTGrapher new extent: 500 @ 200; minX: minPoint; withoutOrigin; yourself. ds := RTData new points: bins; x: [ : c | c ifEmpty: [ minPoint ] ifNotEmpty: [ : d | d anyOne size ] ]; y: #size. ds barShape borderColor: Color black; color: aColor; width: barWidth. g add: ds. " Configure axis settings " g axisY title: axixYLabel; color: Color black; noDecimal. g axisX noDecimal; fromPoint: minPoint; color: Color black; title: axisXLabel. " Open visualization in a new window " g open. Any idea what I am missing? 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