how to plot the graph

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mohd akmal masud 2024-8-8，2:58

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评论： Star Strider 2024-8-8，10:55

采纳的回答： Star Strider

name2.zip

在 MATLAB Online 中打开

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))

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采纳的回答

Star Strider 2024-8-8，3:14

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2143869-how-to-plot-the-graph#answer_1496244

在 MATLAB Online 中打开

name2.zip

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

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mohd akmal masud 2024-8-8，8:39

thank you @Star Strider @Deep

Star Strider 2024-8-8，10:55

@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.)

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