Color Scale for looping script

Hello everyone,

I have some excel files. Each file containing some columns of parameter. I want to plot all of them in one graph with different color gradation (let's say jet colormap).

Below is my existing code from the begining but it failed to plot what I want (I don't know why, this code only plots one file/profile). Does Anyone know the lines I should modify?

best regards,

A=dir('*.xlsx'); %xls

for nn = 1:length(A)
filename = A(nn).name; 
data     = xlsread(filename); %
z        = data(:,1); %first column
s        = data(:,2);
t        = data(:,3);

numprof = length(A); %number of profile
couleur = jet(numprof);
for nprf= 1:numprof
     plot(s,t,'LineWidth',1,'color',couleur(nprf,:));
     %legend of plot (?)
end

end

[Mario Malic]

Add

hold on;

after first line.

[Adi Purwandana]

Thank you, it shows all profiles now but with the same color, not different as jet colormap.

[Dyuman Joshi]

"I want to plot all of them in one graph with different color gradation (let's say jet colormap)."

You are plotting lines, which only have a single color assigned/attributed to them.

If you want to have color gradation, you will have to plot a surface or use scatter.

[Adi Purwandana]

I want something like this.... this plot is using jet as the colormap. I don't think it should be scatter or surface to get.

[Dyuman Joshi]

Okay, you mean different colors for different plots. See my answer below.

Answer 1

[Dyuman Joshi]

There is no need of the 2nd for loop, remove it. I have taken random data for example to show a working code below.

Secondly, use readmatrix instead of the depreacted xlsread.

A=dir('*.xlsx'); %xls

%% Random value
numprof = 10; %length(A); %number of profile

couleur = jet(numprof);

%% Call a figure
figure
%% hold on to retain plots on the same figure
hold on

for nn = 1:numprof
    %filename = A(nn).name; 
    %data     = xlsread(filename); %
    %z        = data(:,1); %first column
    %% Random data for example
    s        = rand(1,6);
    t        = rand(1,6);
    
    
    plot(s,t,'LineWidth',1,'color',couleur(nn,:));
end
hold off
legend(compose("%d", 1:numprof))

[Adi Purwandana]

It works fine. Thank you @Dyuman Joshi

[Dyuman Joshi]

You are welcome!