Displaying multiple line plots with different y-values on same baseline

I have IR data consiting of measured absorbance values and the corresponding wave number and I want to display them such that they all start from a certain baseline on the y axis (absorbance), despite all the individuals scans having differt starting points on the y-axis. So my question is if there is any implemented function that does the trick or if I the only choice is to add/subtract the right amount to the y-axis of each data set to force them to the same baseline.

What I have:

How I would like it:

Answer 1

[Mathieu NOE]

hello

IMO, the simplest trick is to "normalize" your data by removing y(1) to each individual y array so that all lines start at y = 0;

if you want to start to another y value simply add this value

fs=100;                 % sampling frequency
samples = 50 ; % for each block of data for 1 frequency
dt = 1/fs;
t = (0:samples-1)*dt;            % sample period

for ci = 1:10
    y= ci*rand + (1+ 0.2*ci)*sin(2*pi*f1*t);       % raw data
    % y correction code
    yy = y;
    yy = yy - yy(1); % y aligned 
    subplot(2,1,1),plot(y); hold on
    title('raw data')
    subplot(2,1,2),plot(yy); hold on
    title('corrected data')

end

[Mathieu NOE]

there are also tools for baseline removal but that may be overkill in your case