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leoxiong
China
2 Posts |
 Posted - 11/25/2025 : 8:55:27 PM
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I used Python to plot two sets of data. Both underwent grouping operations followed by colormap application. However, only the first set's colors take effect. Regardless of which set is placed first, the second set's colors consistently appear black.
When opening Origin's plot properties under the Group tab, the symbol edge color fails to display correctly. The “Increment” setting is set to “Individual,” with the default being “None.” Why is this happening?
https://my.originlab.com/ftp/forum_and_kbase/Images/err_data.zip
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import os
import pandas as pd
import originpro as op
def plot_excel_sheets(excel_path):
book_name = os.path.splitext(os.path.basename(excel_path))[0]
wb = op.new_book('w', book_name)
xls = pd.ExcelFile(excel_path)
for s_name in xls.sheet_names:
df = xls.parse(s_name)
if df.empty:
continue
X = df.iloc[:, 0]
y_cols = df.iloc[:, 1:]
n_y = y_cols.shape[1]
if n_y == 0:
continue
headers = y_cols.columns.tolist()
wks = wb.add_sheet(s_name)
wks.from_list(0, X, lname='pd')
for i, h in enumerate(headers, 1):
wks.from_list(i, y_cols.iloc[:, i-1], lname=h)
graph = op.new_graph(lname=book_name+"_"+s_name)
gl = graph[0]
half = n_y // 2
# line
if half:
line_rng = f'[{book_name}]{s_name}!(A,B:{half+1})'
plot = gl.add_plot(line_rng, type='l')
gl.group(True, 0, half-1)
plot.set_cmd('-w 1500')
plot.colormap = 'Color4Line'
# scatter
if n_y > half:
scat_rng = f'[{book_name}]{s_name}!(A,{half+2}:{n_y+1})'
plot = gl.add_plot(scat_rng, type='s')
gl.group(True, half, n_y-1)
plot.set_cmd('-z 9')
#plot.set_cmd('-z 9','-csem Color4Line')
plot.colormap = 'Color4Line'
gl.rescale()
if __name__ == '__main__':
EXCEL_FILE = r'C:\Users\DELL\Desktop\example.xlsx'
plot_excel_sheets(EXCEL_FILE)
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ChaoC
USA
216 Posts |
Posted - 11/26/2025 : 1:41:43 PM
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Hello,
You can take the graph you created with this code, open the Plot Details tab, and go to the 'Group' tab for the second group. For 'Symbol Edge Color', set the increment to "By One".
Right-click the graph title bar and select 'Save Template As', give it a name, and save it.
Then change your code to use the template for the graph:
graph = op.new_graph(lname=book_name+"_"+s_name, template=r'C:\your\filepath\templatename.otpu')
Rerun the code. It should now follow the colormap you've used.
Best,
Chao |
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Topic |
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Why colourmap for the second group not work