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cts18488
United Kingdom
83 Posts |
 Posted - 05/25/2022 : 11:14:54 AM
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Origin Ver. 2022 and Service Release: SR1
Operating System: Windows 10 Enterprise
Hi,
Is it possible to change the tick labels in a heatmap with the labels defined by me (example in the picture attached)? So instead of being in sequential order like 1, 2, 3 to be like -2.5, 0, 2.5.
Thank you,
Tibi  |
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YimingChen
1618 Posts |
Posted - 05/25/2022 : 1:53:41 PM
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The question is on which ticks do you want to put the labels -2.5, 0, 2.5? The x-axis has 8 ticks with labels. You don't want to change the x scale, but only labels? Please clarify.
James |
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cts18488
United Kingdom
83 Posts |
Posted - 05/25/2022 : 5:59:21 PM
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| Hi. Sorry for the confusion. You are right; I don't want to change the x-scale, but only the labels. I want to generate/change myself all labels instead, in this case all 8 tick labels. Instead of being 5 10 15... 40, I would like something like -4 -3 -2...3 Please let me know if it is possible. |
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cpyang
USA
1406 Posts |
Posted - 05/25/2022 : 9:05:54 PM
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Yes, this can be done, but will need to use some LabTalk. Basically you put the tick label values into a worksheet column and then tell the axis to use Tick Indexed Dataset as the labels, such that first label will use text from row 1 etc.
We will put together sample code to Github and put the link here shortly.
In the meantime, you can look at this for the GUI interface.
https://www.originlab.com/doc/Origin-Help/AxesRef-TickLabels
and look for Tick Indexed Dataset option.
CP
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cts18488
United Kingdom
83 Posts |
Posted - 05/26/2022 : 08:42:36 AM
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I have tried your suggestion, however it doesn't work how I was imagine. If I change the tick labels from 5 10 15 20 25 30 35 40 to -4 -3 -2 -1 0 1 2 3, everything works fine. If I want to zoom in, let's say 20 to 30, the tick labels do no work the way I want. Instead of displaying -1 0 1, it displays labels from beginning -4 -3 -2. Is it possible to display the way I want (I am attaching a picture that describe the issue I have)? Also, in case of numbers, if I give a minimum and a maximum number, is it possible that Origin generates automatically the rest of the labels at regular intervals, but the same number of labels as the original ones?
Thank you for all your help!
Tibi |
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YimingChen
1618 Posts |
Posted - 05/26/2022 : 12:19:46 PM
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For your case, you can use Label Display Formula instead. See the figure below. If this works for you, do you want to customize the axis label with Python code? as you can save that setting into a template.
Thanks.
James
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cts18488
United Kingdom
83 Posts |
Posted - 05/27/2022 : 07:30:16 AM
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quote:
Originally posted by YimingChen
For your case, you can use Label Display Formula instead. See the figure below. If this works for you, do you want to customize the axis label with Python code? as you can save that setting into a template.
Thanks.
James
This is not what I want as the dimension may change and instead of having a 41x41 heatmap, I might have a 81x81 heatmap. So instead of having from -2.5 to 2.5 in one case, in others I may have from -4 to 0. Label display formula works on individual cases, but not on automation mode.
Is it possible to give in Python the limits (let's say xmin and xmax) and then Origin to consider this as the new 1 and the new 41 (if one has 41 inputs on an axis); then Origin to split them at regular intervals?
Thank you! |
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cpyang
USA
1406 Posts |
Posted - 05/27/2022 : 1:56:53 PM
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How was your data setup? Are you using a matrix? If you are using a matrix to create the heatmap, you can set the XY Mapping in the matrix, like
ms=op.find_sheet('M')
ms.xymap = x1, x2, y1, y2
CP
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cts18488
United Kingdom
83 Posts |
Posted - 05/27/2022 : 2:35:25 PM
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Yes, I am using a matrix. And this is my setup:
wks = op.new_sheet(type='m', lname='16MM')
x1,x2,y1,y2 = 1, columns, 1, rows
wks.xymap = x1,x2,y1,y2
But if I try x1, x2, y1, y2 = -10, 10, -10, 10, It will just ignore the negative numbers and display only the positive ones. |
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cpyang
USA
1406 Posts |
Posted - 05/28/2022 : 2:28:29 PM
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I tried the following simple code and I cannot see a problem
import originpro as op
import numpy as np
arr_2D = np.random.randint(0,4, size=(4,4))
ms = op.new_sheet('m')
ms.from_np(arr_2D)
ms.xymap = -3, 3, -3, 3
gp = op.new_graph(template='heatmap')
gp[0].add_plot(ms, colz=0)
gp[0].rescale('z')
#default XY scale will include the half width of each data point
#so to have same scale as the matrix, we need to force it
gp[0].set_xlim(-3, 3)
gp[0].set_ylim(-3, 3)
With the matrix window active, you can check the XY from
Matrix > Set Dimension/Labels
CP
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cts18488
United Kingdom
83 Posts |
Posted - 05/31/2022 : 04:19:13 AM
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| Thanks, it worked. When I have tried I forgot to change the set_xlim and set_ylim so it didn't work. |
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Change tick labels heatmap