Problem Related to plot

I am plotting a graph, say X vs Y. What command is to be used in order to extract values of Y with respect to Different values of X.? Say, X ranges from 0 to 20 and Y ranges from 0 to 10. The plot is of non-linear nature. I want values of Y for different X such as 10,15 and 23. So what command is to be used to find values of Y?

Answer 1

[Akshat]

Hi @Purva Nagvekar,

In order to get values of Y for different X can be found using the function "interp1".

As you have said, you need values of Y when X is 10,15 and 23. Here, 23 is out of the range of X as you originally specified it will from 0 to 20.

For such values, "interp1" will give NaN values. You can understand more about "interp1" from the following official MathWorks documentation:

https://www.mathworks.com/help/matlab/ref/double.interp1.html#d126e892843

Here is some boilerplate code for using the function:

X = linspace(0, 20, 100); % Example X data
Y = sin(X);               % Example Y data (non-linear relationship)

X_query = [10, 15, 23];

Y_query = interp1(X, Y, X_query);
disp(table(X_query', Y_query', 'VariableNames', {'X', 'Y'}));

Hope this helps!