please help me to correct my program

Question

Supratik Das 2019-3-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/451836-please-help-me-to-correct-my-program

评论： Walter Roberson 2019-3-23

clc;
clear all;
close all;
f1=inputdlg('Enter the value of frequency f1: ');
f2=inputdlg('Enter the value of frequency f2: ');
f3=inputdlg('Enter the value of frequency f3: ');
fm=max(f1,f2);
fm1=max(fm,f3);
fs1=30*fm1;
ts1=1/fs1;
no_of_cycle=4;
t=0:ts1:no_of_cycle*(fs1/fm1)*ts1;
x=sin(2*pi*f1*t)+sin(2*pi*f2*t)+sin(2*pi*f3*t);

Their is a error message

Error using max

Invalid data type. First argument must be numeric or logical.

Error in Ex3

fm=max(f1,f2);

This message shows up when i try to publish the code

Please help me.....

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Answer 1

KALYAN ACHARJYA 2019-3-23

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/451836-please-help-me-to-correct-my-program#answer_366950

编辑：KALYAN ACHARJYA 2019-3-23

在 MATLAB Online 中打开

f1=str2double(inputdlg('Enter the value of frequency f1: '));
f2=str2double(inputdlg('Enter the value of frequency f2: '));
f3=str2double(inputdlg('Enter the value of frequency f3: '));
fm=max(f1,f2);
fm1=max(fm,f3);
fs1=30*fm1;
ts1=1/fs1;
no_of_cycle=4;
t=0:ts1:no_of_cycle*(fs1/fm1)*ts1;
x=sin(2*pi*f1*t)+sin(2*pi*f2*t)+sin(2*pi*f3*t)