MATLAB: Could anyone help me to plot the graph.

graph

I am using the following lines in my code to plot the graph. code:

xlim([0,25]);
set(gca,'XTick',[0:1:25]);

with respect to xaxis i need to have only 0,1,2,23 (only four numbers)

If i use the above lines in my code it is displayed as

0,1,2,3,……………25.

what should I do inorder to get only 0,1,2,23 in the graph.

Best Answer

set(gca, 'XTick', [0, 1, 2, 23]);

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MATLAB: Could anyone tell me how to have equal spacing of selected numbers with respect to axis.

tx = XData;
mask = tx > 2.5;
tx(mask) = tx(mask) - 20;
plot(tx, YData);
xlim([0 4]);
set(gca, 'XTick', [0, 1, 2, 3,4]);
set(gca,'XTickLabel',num2str([0;1;2;23;24]))
dcm = datacursormode(gcf, 'DisplayStyle', 'datatip', 'UpdateFcn', @myupdatefcn, 'SnapToDataVertex', 'on');

with

function txt = myupdatefcn(src, event)
  loc = event.Position;
  x = loc(1);
  y = loc(2);
  if x > 2.5; x = x + 20; end
  txt = {sprintf('x: %g', x), sprintf('y: %g', y)};

The assignment to dcm and the function are not needed if you do not care about what data cursor mode (tooltips) shows.

MATLAB: Setting axis properties is cropping the graphic (imagesc)

When you use imagesc() without specifying XData or YData (or x and y), then the default XData is to place the center of the pixels one data unit apart, so they would be at 1, 2, 3, ... number of columns. When you then set your XLim to [0 1] you are restricting the view on the image to show only what is visible in x range 0 to 1. That is going to be only half of the first column of pixels (with 1 as the center, the first pixel would occupy from 0.5 to 1.5 on the x axis.)

If you want the image to be placed within the range [0 1] then you should instead be using

imagesc(matrixA(:,:,1), [0 1], 'XData', [0 1], 'YData', [0 1]);

However, you might want to adjust that slightly to take into account that those are the centers you are specifying. For example you might want something like

   x = linspace(0, 1, size(YourImage,2)+2 );
   xlimit = [x(2), x(end-1)];

and then use xlimit as the XData for imagesc

Best Answer

Related Solutions

MATLAB: Could anyone tell me how to have equal spacing of selected numbers with respect to axis.

MATLAB: Setting axis properties is cropping the graphic (imagesc)

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