If i make the marker index 1 the error goes away.
Marker indices for a plot error
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Commented: Star Strider on 15 Aug 2021
So for whatever reason matlab will not allow me to make a marker index of less then 1. I get an error of
"Value must be a vector of positive integers."
I dont understand the problem. The plot has an x axis scale of very small numbers like .00001-.0001
So naturally my markers must be in that range.
Does anyone know why im getting this error?
the cyclist on 15 Aug 2021
The MarkerIndices Name-Value pair is expecting the indices of the data points (e.g. the 1st, 5th, and 10th data point) to place the markers, not the values of those data points.
You might want to use the XTick property of the axes instead.
From the documentation on MarkerIndices:
‘Indices of data points at which to display markers, specified as a vector of positive integers’
and 0.01 is not an integer.
In that situation, and you want to put it at a x-value of 0.01, use interp1 and tthe x-values to find the y-values for the markers —
x = -0.5:0.13:2.5;
y = (x-1).^2;
xp = 0.01;
yp = interp1(x, y, xp);
hp = plot(xp, yp, 'p');
hp.MarkerSize = 10;
hp.MarkerFaceColor = 'g';
If you have the y-values and want to find the x-values, this becomes a bit more complicated, however otherwise straightforward.
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