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multiple colorbar in ocatve


multiple colorbar in ocatve

By : user2953493
Date : November 21 2020, 01:01 AM
wish helps you As you have stated in your edit with x representing your vector U and y time you need an 2D array, for example PlotArray, with size n*length(U)
code :


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data visualization. 3D, precison, recall, and f-measure. maybe using ocatve?

data visualization. 3D, precison, recall, and f-measure. maybe using ocatve?


By : thulium3
Date : March 29 2020, 07:55 AM
it helps some times I suppose the first column is some threshold you varied between lines. The precision-recall graph is precision-vs-recall. Thus we can first retrieve those two columns from your data: (suppose your data are saved in prf.data).
code :
cat prf.data | awk '{print $3,$5}'
data = [
0.6000000238418579 0.010416666977107525
0.6363636255264282 0.01215277798473835
0.6666666865348816 0.013888888992369175
0.6153846383094788 0.013888888992369175
0.6428571343421936 0.015625
0.6000000238418579 0.015625
0.5625 0.015625
0.529411792755127 0.015625
0.5555555820465088 0.0173611119389534
0.5263158082962036 0.0173611119389534
0.5 0.0173611119389534
0.4761904776096344 0.0173611119389534];
plot(data(:,2), data(:,1), 'x')
ylabel('precision')
xlabel('recall')
Colorbar offsetText (scientific base multiplier) move from top to bottom of colorbar

Colorbar offsetText (scientific base multiplier) move from top to bottom of colorbar


By : Aio
Date : March 29 2020, 07:55 AM
Hope this helps It's in general not possible to change the position of the offsetText label. This would still be an open issue.
A solution can therefor be to overwrite the yaxis' _update_offset_text_position method to position the offsetText on the bottom of the yaxis.
code :
import matplotlib.pyplot as plt
import types

def bottom_offset(self, bboxes, bboxes2):
    bottom = self.axes.bbox.ymin
    self.offsetText.set(va="top", ha="left")
    self.offsetText.set_position(
            (0, bottom - self.OFFSETTEXTPAD * self.figure.dpi / 72.0))

fig, ax = plt.subplots()
im = ax.imshow([[1e5,2e5],[0.1e5,1e5]])
cb = plt.colorbar(im)
cb.formatter.set_scientific(True)
cb.formatter.set_powerlimits((0,0))

def register_bottom_offset(axis, func):
    axis._update_offset_text_position = types.MethodType(func, axis)
register_bottom_offset(cb.ax.yaxis, bottom_offset)

cb.update_ticks()

plt.show()
self.offsetText.set(va="top", ha="right")
self.offsetText.set_position(
            (1, bottom - self.OFFSETTEXTPAD * self.figure.dpi / 72.0))
how to set sequential positive colorbar range with lowest value in the middle of colorbar

how to set sequential positive colorbar range with lowest value in the middle of colorbar


By : Scott Neu
Date : March 29 2020, 07:55 AM
this will help What you're asking for is a cyclic colormap. As of now, matplotlib only provides one single cyclic colormap, namely "hsv". You may however define your own colormap easily and make sure it's cyclic, e.g. using the colors ["gold", "red", "black", "navy", "gold"] where the first and the last color are the same.
code :
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.colors as mcolors
plt.rcParams['lines.markersize'] = 12

x = np.arange(200)
y = np.ones(200)

fig, ax = plt.subplots()
ax.scatter(x,y, c=x % 52, marker="|" )

ax.scatter(x,y-1, c=x % 52, cmap="hsv", marker="|" )

colors = ["gold", "red", "black", "navy", "gold"]
cmap = mcolors.LinearSegmentedColormap.from_list("", colors)
ax.scatter(x,y-2, c=x % 52, cmap=cmap, marker="|" )

ax.set_yticks([-1,0,1])
ax.set_yticklabels(["custom", "hsv", "viridis", ])
ax.margins(y=0.4)
plt.show()
How to position the label of a horizontal matplotlib colorbar object exactly at the center of the colorbar below or abov

How to position the label of a horizontal matplotlib colorbar object exactly at the center of the colorbar below or abov


By : user1763941
Date : March 29 2020, 07:55 AM
help you fix your problem An axis label (ylabel) is designed to be placed along the corresponding axis. A title, on the other hand, is, by design, positioned centered over the axes object. So instead of using an set_ylabel, you should be using set_title.
code :
cbar.ax.set_title('$[M_\u2609 kpc^{{-2}}]$', fontsize=20)
How to run an ocatve command from the terminal with several arguments including a matrix?

How to run an ocatve command from the terminal with several arguments including a matrix?


By : user1818342
Date : March 29 2020, 07:55 AM
wish help you to fix your issue You can call your function file without using argv ()
file matrixMultiply.m:
code :
function matrixMultiply (A, x)
  result = A * x ; 
  presult = sprintf('%s %s\n', 'A * x =', mat2str(result));
  printf ("\a%s\n", presult);
endfunction 
$ octave --eval "matrixMultiply(eye(2) , [3;4])"
A * x = [3;4]
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