Plotting values from a function in different script

13 ビュー (過去 30 日間)
Sarah Gomez
Sarah Gomez 2022 年 2 月 11 日
編集済み: Sarah Gomez 2022 年 2 月 11 日
function [xvals,yvals]=fourier(L,nmax,numpoints)
xvals=[];
yvals=[];
for x=1:numpoints
y=0;
for n=1:2:nmax
y=y+(1/n)*(sin((n*pi*x)/L));
end
y=4*y/pi;
xvals=[xvals;x];
yvals=[yvals;y];
end
end
====================================================
[xvals,yvals]=fourier(L,nmax,numpoints);
x = xvals;
y = yvals;
L= 0;
plot(x, y);
I have a function that returns two very long column vectors for xvals and yvals. I'm struggling to create another script that calls upon this function and plots the respective xvals vs yvals. The code below the line gives me an error saying L is not recognized but I don't use it so I'm a bit confused.

採用された回答

KSSV
KSSV 2022 年 2 月 11 日
編集済み: KSSV 2022 年 2 月 11 日
You have to define the required input variables first and then call the function.
L = 1. ;
nmax = 100 ;
numpoints = 1000 ;
[x,y]=fourier(L,nmax,numpoints);
plot(x,y);
function [xvals,yvals]=fourier(L,nmax,numpoints)
xvals=zeros(numpoints,1) ;
yvals=zeros(numpoints,1) ;
for i=1:numpoints
y=0;
for n=1:2:nmax
y=y+(1/n)*(sin((n*pi*i)/L));
end
y=4*y/pi;
yvals(i) = y ;
xvals(i) = i ;
end
end
  3 件のコメント
KSSV
KSSV 2022 年 2 月 11 日
編集済み: KSSV 2022 年 2 月 11 日
It depends on the input you have given. Show us your input.
You might be inputting L as zero? Is it... If so change L, L cannot be zero, As it comes in the denominator, all your y values will be zero.
I have edited the code.
Sarah Gomez
Sarah Gomez 2022 年 2 月 11 日
編集済み: Sarah Gomez 2022 年 2 月 11 日
I've tried returning a sign wave for random inputs but I can't get it right.
[xvals, yvals] = fourier(0.1, 3, 200)
[xvals, yvals] = fourier(0.1, 9, 200)
[xvals, yvals] = fourier(0.1, 100, 200)
They all return fine but not in the shape I want.
For example the top tests returns a graph like this

サインインしてコメントする。

その他の回答 (0 件)

カテゴリ

Help Center および File ExchangeDescriptive Statistics and Visualization についてさらに検索

タグ

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by