matplotlib - How to eliminate whitespace in pyplot heatmaps? -

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i trying make heatmap using pcolor in pyplot

data=np.array(old_data) fig, ax=plt.subplots() mymap=ax.pcolor(data, cmap=plt.cm.blues) ax.autoscale(tight=true) plt.show()

for reason keep getting blank white columns between heatmap columns: enter image description here

is there missing or doing wrong?


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