To get the graph of data

Hi,

I'm trying to get the graph using the data which I have now.

The simple shape of the graph that I'm trying to get is like this. Absorption is high only for the specific part.

Here, what I want to do is to have the graph like above one by rid-off the data1 from data 2.

You can easily understand when you see the drawing below

(data2) (data1)

By repeating this kind of process, I can get this kind of graph. This kind of graph is the goal of my work.

The graph of the data that I have is like this.

Here, I'm trying to make the graph by rid-off the data (7) from (8), rid-off the data of (6) from (7) and~~~like that.

So I made the code like this.

/////////////
clear;
closeall;

data=matrix(681,4,5);

for (a=[2:2:8]){

    for (y=[1:5]){
    
        filename= "Pitch_"+num2str(y)+"dia_"+num2str(a)+".fsp";

if (fileexists(filename)) {
    load(filename);  
    
    z0 = transmission("R");
    z1 = transmission("T");
    
    data(:,a,y)=1-z0+z1;
    
    
}

data=matrix(681,4,5);

for (b=[1:2:7]){

    for (y=[1:5]){
    
        filename= "Pitch_"+num2str(y)+"dia_"+num2str(b)+".fsp";

if (fileexists(filename)) {
    load(filename);  
    
    z0 = transmission("R");
    z1 = transmission("T");
    
    data(:,b,y)=1-z0+z1;

}

for (x=[1:4]){

2*x=a;
2*x=b+1;

data(:,x,y)=data(:,b,y)-data(:,a,y);

}
    }}
    
else {
    ?"File not found.";

}     
f = getdata("R","f");
lambda = 3e14/f;
x=[1:4];
pitch=[1:8];


 for(j=[1:8]){



    plot(lambda,data(:,x,j),"Wavelength(um)", "Absorpiton");
     legend("20 nm","40 nm","60 nm", "80 nm");
                    setplot("x max",1.0);
                                        setplot("x min",0.32);

   setplot("y max",1.0);
                                        setplot("y min",0);

 }



///////////////

But it doesn't work at all.

Please give me the solution or other ways to get the graph that I want to get.

[Mehmed Saad]

Try plotting it in db

i.e.

plot(Wavelength,db(Absorpiton))

[Walter Roberson]

That is not MATLAB code. I do not know what programming language it is.