在Matlab中绘制多条线(在单元格阵列中通过线型循环) [英] Plot several lines (looping through line styles in cell array) in Matlab

问题描述

我已编写此循环以绘制结果的每一行，并且收到错误消息

I have written this loop to plot each line of results and I get the error message

使用图时出错.无效的第一个数据参数.

Error using plot. Invalid first data argument.

到目前为止看起来像这样

So far it looks like this

test=rand(5,6);
xint=[1:1:6];
LineSpec = {'-y', '--m', ':c', '-r.', '-b', ':s'};

for ii=1:5,
    plot(xint,test(ii,:),LineSpec(ii),'linewidth',2);
    hold on;
    legend_str{ii} = num2str(ii);
end

如果我使用plot(xint,test(ii,:),'-y','linewidth',2)，那么它将起作用.但是如何在遍历线型时避免错误?

If I use plot(xint,test(ii,:),'-y','linewidth',2) then it works. But how can I avoid the error when looping through line styles?

推荐答案

您应该写:

plot(xint,test(ii,:),...
        LineSpec{ii},...
        'linewidth',2);

LineSpec是一个单元格数组，所以LineSpec(ii)返回一个单元格，而plot要求一个字符数组作为行属性.

LineSpec is a cell array, so LineSpec(ii) returns a cell, while plot asks for a character array as line properties.

您可以在呼叫LineSpec时看到区别:

you can see the difference when you call LineSpec:

>> LineSpec{1}
ans =
-y
>> LineSpec(1)
ans = 
    '-y'

当输出为单元格时，答案会缩进并带有单引号.

When the output is a cell then the answer is indented and has the single-quote marks.

这篇关于在Matlab中绘制多条线(在单元格阵列中通过线型循环)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！