I want to extract values from a graph

Question

Andreas Makrides 2020-11-2

编辑： Gouri Chennuru 2020-11-5

I have a graph and i have one coloum array, how can i find the graph value for each point of the array

Answer 1

Gouri Chennuru 2020-11-5

编辑：Gouri Chennuru 2020-11-5

Hi Andreas,

As a workaround, You can try the following steps,

Step 1: use the x and y data values from the graph which are already available, and if the x is in the x array that you plotted, you can do this:

index = find(x == desiredXValue);   % May be multiple indexes, possibly
yDesired = y(index);

Step 2: Now, if the desired x is not in your x array, then you can use “interp1()” to get the interpolated/estimated y value for that x.

yDesired = interp1(x,y, desiredXValue);

Hope this Helps!