MATLAB - Increasing spacing between x-axis points (non-uniform plotting) other than logarithmic

1
votes

I want to increase spacing between x-axis points so that, for example in the plot below, the distance between 10 30 increases and the distance between 1150 and 1300 decreases.

enter image description here

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matlabplotmatlab-figure

1 Answers

0
votes

Answer to new question (distorting the x-axis field to affect points):

Unfortunately my research shows no built-in way to do this in MATLAB. I see others suggesting:

  1. Distorting the field in your own data, e.g. change x-value from 10, 30, and 50 to 100, 300, and 500 to get 10x magnification, then add 500 to all other x-values so they shift to the right; and then modifying the labels (see below) to read "10", "30", "50", "100", etc.

  2. Using a histogram, where your x-axis labels become bins, e.g. 10, 30, 50, 100, etc. and you use empty bins to space the points.

Answer to old question (affecting x-axis labels and ticks, not points):

From the MathWorks docs, it appears you can arbitrarily set the tick locations, whether uniform or not:

ax = gca;
ax.XTick = [-3*pi -2*pi -pi 0 pi 2*pi 3*pi];
ax.YTick = [-1 -0.5 0 0.5 1];

% For R2014a and earlier:
% ax = gca;
% set(ax,'XTick',[-3*pi -2*pi -pi 0 pi 2*pi 3*pi])
% set(ax,'YTick',[-1 -0.5 0 0.5 1])

So, write a function that creates the spacing you desire and assign its return to XTick. In your case, it looks like you just need to retrieve the domain values of the points you want to plot.