matlab-figure

I am having trouble with updating subplots. I've boiled my problem down to the following example: win = figure(1); win.sub1 = subplot(2, 2, 1); win.sub2 = subplot(2, 2, 2); win.sub3 = subplot(2, 2, 3); win.sub4 = subplot(2, 2, 4); x = 1:1:10; plot(win.sub2, x, x); %graphs the line y = x in the second subplot, good. hold on; plot(win.sub2, x, -x) %ought to plot line y = -x over line y = x, but does not. When executing the second plot, the first plot disappears despite the hold on. The only thing that seems to make this work is if I use axes(win.sub2), but I'm trying to avoid that because it

I have a matrix to be plotted one column at a time. Is it possible to add a slider to a MATLAB figure (without heavy GUI programming) so that by moving the slider, different columns are shown in the current axis? Here is a code for a slider to plot corresponding column: m = ones(5,1)*(1:5); slmin = 1; slmax = size(m,2); plot(m(:,1)) hsl = uicontrol('Style','slider','Min',slmin,'Max',slmax,... 'SliderStep',[1 1]./(slmax-slmin),'Value',1,... 'Position',[20 20 200 20]); set(hsl,'Callback',@(hObject,eventdata) plot(m(:,round(get(hObject,'Value')))) ) EDIT : For better performance you can just

How can I convert an RGB histogram of an image to create a histogram showing the combined colors along with correct color wavelength range? Example code: pkg load image f=imread('/tmp/marbles.jpg'); f=uint8(f); %need to convert back to uint8 to show picture %Split into RGB Channels f_red = f(:,:,1); f_green = f(:,:,2); f_blue = f(:,:,3); %Get histValues for each channel [y_f_red, x] = imhist(f_red); [y_f_green, x] = imhist(f_green); [y_f_blue, x] = imhist(f_blue); subplot (2,1,1); imshow(f); subplot (2,1,2); plot(x, y_f_red, 'r', x, y_f_green, 'g', x, y_f_blue, 'b'); Example image along with

I am currently using the fill command in MATLAB to create a graph of boxes that were created using the 'fill' command (the actual code is based off this StackOverflow Question . My issue is that the boxes that I create do not have "corners." I am attaching a PNG that illustrates the issue. Note that you have to look a little carefully since the image was heavily rendered, though in this example my arrows also look weird since they don't have edges either) I am wondering if anyone has an idea of what might be going wrong? The boxes appear this way immediately after I use the fill command, which

I created the following 3d plot in MATLAB using the function plot3 : Now, I want to get a hatched area below the "2d sub-graphs" (i.e. below the blue and red curves). Unfortunately, I don't have any idea how to realize that. I would appreciate it very much if somebody had an idea. gnovice You can do this using the function fill3 and referencing this answer for the 2D case to see how you have to add points on the ends of your data vectors to "close" your filled polygons. Although creating a pattern (i.e. hatching) is difficult if not impossible, an alternative is to simply adjust the alpha

Given a .fig file of a Matlab boxplot (i.e. underlying data not available), is it possible to change the PlotStyle attribute (from 'traditional' to 'compact')? This question is kind of tricky because not like other graphic objects in Matlab, boxplot is a group of lines. As so, all the properties that are set while you create it are inaccessible (and in fact does not exist) after plotting. One option to deal with that is to create a 'dummy' boxplot, and then alter it to your data. Because boxplot has no simple properties of XData and YData , at least not as we use to them, it takes some work to