how to save plots in a folder. named as figure1,Fi​gure2,Figu​re3,Figure​4?

i have 40 list of people data

each data is having 2 data of age

i have used image below to explain it clearly

so from age data a1 4 graphs and a2 4 graphs

from 1 data i am getting 8 graphs..

i am facing difficulty to save graphs numbered as figure1,figure2 in a folder

a=dlmread('S11.txt')

freq=a(:,1)

Spam=a(:,2)

Spam=reshape(Spam,[1,21])

x = freq;

y = spam;

plot(x,y);

grid on

title('plot');

xlabel('freq');

ylabel('sparm');

is there any command which will find out no of figures already generated and then based on that save the figures

like this i have to plot for multiple sparameters ..how to save it as figure1 figure2 .figure 3 in jpg format in folder

2018a version

Answer 1

[Voss]

files = dir('*.txt');
files = fullfile({files.folder},{files.name});

for ii = 1:numel(files)
    
    a=readmatrix(files{ii});
    
    f = figure();
    plot(a(:,1),a(:,2));
    grid on
    title('plot');
    xlabel('freq');
    ylabel('sparameter');
    saveas(f,sprintf('figure%d.jpg',ii));
    delete(f);
    
end
dir('*.jpg')

figure1.jpg  figure2.jpg  

[Rakesh Roshan]

Sir the files I have attached in text format it is in ASCII form in my real code

[Voss]

OK. What's the problem?

[Rakesh Roshan]

Thank you sir, this worked well...in my code ...and i got the way to read from ascii file from documentation

now sir i am facing problem in storing these values in text files in .csv format

sir in some files i am getting no of samples in text files around 500 or 1001 or 1107,2001 i am using this commands

a=reshape(a(:,2),[1,500])

dlmwrite('output.csv',a.'-append')

but no luck as i am getting and error

is there any way where i can control reshaping i.e how much ever elements are there i have to fix it to 1 row and 500 columns only.

[Voss]

To take the first 500 elements of column 2 of a, convert it to a row vector, and store it as a:

a = a(1:500,2).';

If there are fewer than 500 elements, you'd have to augment to 500, if you always need it to be 500.