I'm trying to convert the following code to Python from MATLAB for an EEG Project (partly because Python's slightly cheaper!) Hopefully someone can point me in the right direction: I've started to alter it but got bogged down: Particularly trying to find equivalent functions. Tried scipy.org (NumPy_for_Matlab_Users etc.) but I'm not s...
Hi! I'd like to save figurecanvas as bitmap and don't need grey border around the plot in it. How can I hide this? ...
I think I may have misunderstood something here... But here goes. I'm using the psd method in matplotlib inside a loop, I'm not making it plot anything, I just want the numerical result, so: import pylab as pyl ... psdResults = pyl.psd(inputData, NFFT=512, Fs=sampleRate, window=blackman) But that's being looped 36 times every time I ...
Hi. I like to switch x axis with y axis after plotting a graph with matplotlib? Any easy way for it? Thanks in advance. ...
I have a fairly simple plotting routine that looks like this: from __future__ import division import datetime import matplotlib matplotlib.use('Agg') from matplotlib.pyplot import figure, plot, show, legend, close, savefig, rcParams import numpy from globalconstants import * def plotColumns(columnNumbers, t, out, showFig=False, fil...
I have a set of X,Y data points (about 10k) that are easy to plot as a scatter plot but that I would like to represent as a heatmap. I looked through the examples in MatPlotLib and they all seem to already start with heatmap cell values to generate the image. Is there a method that converts a bunch of x,y, all different, to a heatmap (...
Say that I have two figures in matplotlib, with one plot per figure: import matplotlib.pyplot as plt f1 = plt.figure() plt.plot(range(0,10)) f2 = plt.figure() plt.plot(range(10,20)) Then I show both in one shot plt.show() Is there a way to show them separately, i.e. to show just f1? Or better: how can I manage the figures separat...
Does anyone know a way to get matplotlib to render accented chars (é,ã,â,etc)? For instance i'm trying to use accented chars on set_yticklabels() and matplot renders squares instead, and when i use unicode() it renders the wrong chars. Is there a way to make this work? Thanks in advance, Jim. Update Turns out you can use u"éã" but f...
I am experimenting with matplotlib at the moment. Some time ago I used Excel VBA code to produce images such as the one attached. You will notice it is not presented in a scientific/research style but rather as if produced by a school-student on graph paper - with three different grid-line styles. Is there a fairly straightforward way ...
I am using matplotlib and numpy to make a polar plot. Here is some sample code: import numpy as N import matplotlib.pyplot as P angle = N.arange(0, 360, 10, dtype=float) * N.pi / 180.0 arbitrary_data = N.abs(N.sin(angle)) + 0.1 * (N.random.random_sample(size=angle.shape) - 0.5) P.clf() P.polar(angle, arbitrary_data) P.show() You wil...
With say 3 rows of subplots in matplotlib, xlabels of one row can overlap the title of the next; one has to fiddle with pl.subplots_adjust( hspace ), annoying. Is there a recipe for hspace that prevents overlaps and works for any nrow ? """ matplotlib xlabels overlap titles ? """ import sys import numpy as np import pylab as pl nrow = ...
Hello, I can't understand how to refresh FigureCanvasWxAgg instance. Here is the example: import wx import matplotlib from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as FigureCanvas from matplotlib.figure import Figure class MainFrame(wx.Frame): def __init__(self): wx.Frame.__init__(self, None, wx.NewId(...
Hi there, I have to VPN and then ssh from home to my work server and want to run a python script in the background, then log out of the ssh session. My script makes several histogram plots using matplotlib, and as long as I keep the connection open everything is fine, but if I log out I keep getting an error message in the log file I cre...
Hi fellow Stackers! I am using imshow() in matplotlib like so: import numpy as np import matplotlib.pyplot as plt mat = '''SOME MATRIX''' plt.imshow(mat, origin="lower", cmap='gray', interpolation='nearest') plt.show() How do I add a legend showing the numeric value for the different shades of gray. Sadly, my googling has not uncover...
Hi, I need to install matplotlib in a remote linux machine, and I am a normal user there. I downlodad the source and run python setup.py build but I get errors, related with numpy, which is not installed, so I decieded to install it first. I download and compile with python setup.py build My question now is, how do I tell to te...
I have a python script that uses plt.show() as it's last instruction. When it runs, IDLE just hangs after the last instruction. I get the image but I don't get the prompt back. On other scripts I typically use ctrl-c to break the program (sometimes doesn't work immediately) but how do I get the prompt back with the plt.show()? Ctrl-c do...
Hi, I get a histogram picture in matplotlib which looks great. Now I realize I need a log scale on the y-axis, so I just add to the code: ax.set_yscale('log') but then, the histogram bars dissapear and I only get some sparse points, do you know waht could be the reason? Thanks ...
Hi, I wrote an algorithm using python and matplotlib that generates histograms from some text input data. When the number of data input is approx. greater than 15000, I get in the (append) line of my code: mydata = [] for i in range(len(data)): mydata.append(string.atof(data[i])) the error: Traceback (most recent call last): F...
I have a python module that imports a module generated with swig. When I try to call the show() function of matplotlib later in that module, python crashes without any hint, what went wrong. When I comment the import statement with the swig generated module out, everything works fine. Does anybody have a clue to what could be the reason ...
Hey all, I'm using PyLab to make some graphs in Python. I want to make a text box that is colored magenta with black text, but cannot get the text to be black. text(x, y, 'Summary', backgroundcolor = 'm', color = 'k') This gives me a magenta background and then text that is almost just as pink. Any ideas what I'm doing wrong? Many th...