imshow

I am trying to make a circular diffraction pattern, which has a central spot surrounded by a series of rings. It involves a Bessel integral to do it which is defined in the code. My problems is that it takes too long like I waited 10 min for the code to run but didn't get anything to display. I understand it is because my Bessel integral has 1000 iterations per point can any one help with this ? Am I on the right track? I am trying to self teach myself python and computational physics via Mark Newmans book Computational Physics the exercise is 5.4 of Computational Physics.Here is a link to the

Apart from the fact there exist special functions to plot vector fields, I have encountered a strange Matlab behaviour : Plotting an image (with imagesc or imshow ) and overlaying it with colored lines (with plot or line ) leads at some point to an erasement of the background image. %% some data... % random image Image = rand(200,400); % 900 lines of random color color1 = rand(1,900); color2 = rand(2,900); color3 = rand(3,900); % some positions x = 31:60; y = 31:60; [X,Y] = meshgrid(x,y); %% plot process % plot Image (with 'imshow' or 'imagesc') imshow(Image); hold on; % plot the lines (with

I am testing scipy.misc.imshow and I got RuntimeError: Could not execute image viewer . I am using Python3.4 and running it on CentOS 7. import scipy.misc img = scipy.misc.imread('Data/cat.jpg') assert len(img.shape) == 3 img_resized = scipy.misc.imresize(img, (224, 224)) img_answer = (img_resized/255.0).astype('float32') scipy.misc.imshow(img_answer) And I got an error: sh: see: command not found Traceback (most recent call last): File "/usr/local/pycharm/helpers/pydev/pydev_run_in_console.py", line 71, in <module> globals = run_file(file, None, None) File "/usr/local/pycharm/helpers/pydev