MATLAB: Line intersection without polyfitting

intersectionlineMATLABplotpolyfit

is it possible to get the values of intersections without Polyfitting the Data? just from the plot itself

From the plot?! Why would polyfit be useful for finding the intersection of lines? Do you mean the polyxpoly command?

Did you ask an internet search engine for "Matlab intersection lines" already? You will find:

I'll take you at your word that you know what you are doing.

ws = warning('off','all');  % Turn off warning
P = polyfit(x,y,N);
warning(ws)  % Turn it back on.

Without having your data and just looking at your code, I observe that you have

for n = 1 : 1 : 48
...
clippedfP2=clippedfP(1,70);
...
temp = polyfit(clippedfP2 (n,:) ,clippedRatioP12 (n,:) ,1); % least squares fitting to a line

so it appears you are getting a variable clippedfP2 with just one row and then you are indexing into its nth row.

Also, in order to get more and better answers, consider editing your submission and putting all the code into "code" format.