how to plot the graph

Hello Everyone,

I have some data as attached. Then I have the code to plot the graph. But I have to convert my file to excel first.

Anyway have that I can plot grpah wothout convert my file to excel?

clc
clear all
close all
spec=readlines('nema2.spe');  % read as text
whos spec
data=readmatrix('nema2.spe.xlsx'); %the data from point1.prn must export to excel first.
whos data
%then from excel, it can be plotted.
plot(data(:,1),data(:,2))

Answer 1

[Star Strider]

There is no need to convert it to Excel. It is only necessary to tell readmatrix (introduced in R2019a) that it is a text file, since that is not obvious from the file extension. Otherwise, readtable (inttroduced in R2013b) will work, with a minor modification to the readmatrix code.

Try this —

Uz = unzip('name2.zip')

Uz = 1x1 cell array
    {'name2.spe'}

A1 = readmatrix(Uz{1}, 'FileType','text')

A1 = 512x2

0.5000 0.4389 1.0000 0.4886 1.5000 0.5076 2.0000 0.5121 2.5000 0.5063 3.0000 0.4991 3.5000 0.4867 4.0000 0.4771 4.5000 0.4651 5.0000 0.4516

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x = A1(:,1);
y = A1(:,2);

figure
plot(x, y)
grid

T1 = readtable(Uz{1}, 'FileType','text')

T1 = 512x2 table
    Var1     Var2  
    ____    _______

    0.5     0.43895
      1     0.48862
    1.5      0.5076
      2     0.51209
    2.5     0.50632
      3     0.49912
    3.5     0.48669
      4     0.47707
    4.5     0.46511
      5      0.4516
    5.5     0.43467
      6     0.42078
    6.5      0.4021
      7      0.3875
    7.5     0.37563
      8      0.3562

x = T1{:,1};
y = T1{:,2};

figure
plot(x, y)
grid

.

[mohd akmal masud]

Thank you @Star Strider. Its Work.

Then how to:

1) add title axis? let say i want my x axis is Energy(keV), my y axis is counts.

2) If I want to add the another graph in one figure, how? Let saya as attached is my another graph.

example:

[Deep]

For a quick introduction to plotting and to enhance your MATLAB skills, I highly recommend completing the MATLAB Onramp course. This 2-hour course will guide you through the basics of MATLAB and make it easier to tackle similar problems in the future.

Link to MATLAB Onramp - https://matlabacademy.mathworks.com/details/matlab-onramp/gettingstarted

To address your problem of adding plot title and axis labels to the figure, you can use the MATLAB functions “xlabel”, “ylabel” and “title”. Here’s a quick example:

xlabel('Energy (keV)') 
ylabel('Counts') 
title('Energy vs Counts') 

For adding another plot to an existing plot, you can use the “hold” statement as shown here:

UnzippedPoint1 = unzip('point1.zip') 
A2 = readmatrix(UnzippedPoint1{1}, 'FileType', 'text'); 
x2 = A2(:,1); 
y2 = A2(:,2); 
 
hold on 
plot(x2, y2) 
hold off 
 
legend('Dataset 1', 'Dataset 2') 

Here’s the final output utilizing the 2 code snippets above:

If you wish to have the data as 2 separate subplots in the same window, you may use the “subplot” function linked at the bottom of this answer.

Here are some documentation links to learn more about functions used:

• xlabel - https://www.mathworks.com/help/matlab/ref/xlabel.html
• ylabel - https://www.mathworks.com/help/matlab/ref/ylabel.html
• title - https://www.mathworks.com/help/matlab/ref/title.html
• hold - https://www.mathworks.com/help/matlab/ref/hold.html
• subplot - https://www.mathworks.com/help/matlab/ref/subplot.html

Hope this helps!

[mohd akmal masud]

thank you @Star Strider @Deep

[Star Strider]

@mohd akmal masud — As always, my pleasure!

To add axis labels to a 2D plot, use xlabel and ylabel, and to add a title, use title. (There are similar functions for 3D plots and groups of plots such as those produced by the tiledlayout function.)