尝试使用MATLAB创建迭代(初学者)

Question

我对Matlab非常陌生,我试图尝试制作一个简单的迭代脚本.基本上我想做的就是情节:

1*sin(x)
2*sin(x)
3*sin(x)
...
4*sin(x)

这是我写的程序:

function test1
x=1:0.1:10;
for k=1:1:5;
    y=k*sin(x);
    plot(x,y);
end % /for-loop
end % /test1

但是,它只绘制y = 5*sin(x)或者最后一个数字是......

有任何想法吗？

谢谢!阿米特

Answer 1

您需要使用该命令hold on确保每次绘制新内容时都不会删除绘图.

function test1
figure %# create a figure
hold on %# make sure the plot isn't overwritten
x=1:0.1:10;
%# if you want to use multiple colors
nPlots = 5; %# define n here so that you need to change it only once
color = hsv(nPlots); %# define a colormap
for k=1:nPlots; %# default step size is 1
    y=k*sin(x);
    plot(x,y,'Color',color(k,:));
end % /for-loop
end % /test1 - not necessary, btw.

编辑

您也可以在没有循环的情况下执行此操作,并根据@Ofri的建议绘制2D数组:

function test1
figure
x = 1:0.1:10;
k = 1:5;
%# create the array to plot using a bit of linear algebra
plotData = sin(x)' * k; %'# every column is one k
plot(x,plotData)