尝试在MATLAB中将颜色图应用于条形图 [英] Trying to apply a color map to a bar graph in MATLAB

问题描述

我有一组试图将其绘制为直方图的数据.另外，我想根据x轴位置为各个条着色. CData ，这里描述的似乎可以满足我的要求，但我无法正常工作.

I have a collection of data that I am trying to graph as a histogram. Additionally, I would like to color the individual bars as a function of the x axis location. CData, described here seems to do what I want but I can't get it to work.

这是我的代码:

h = bar(new_edge,N,'hist','FaceColor','flat');
hold on

for n = 1:length(N)
    if (x - x/1.09) - (x-1) > 0
        probability(n) = 1 - ((x-x/1.09) - (x-1))/((x - 1/1.09)+(x/0.91 - x)); 
    else
        probability(n) = 1;
    end

    color_num = 30;
    cm = jet(color_num);
    min = 0.5450;
    max = 1;

    color_map_index = floor(1 + (probability(n) - min)/(max-min)*(color_num-1));
    rbg = cm(color_map_index,:);

    h.CData(n,:) = rbg;

end

类似于MATLAB示例，我首先创建我的条形图.接下来，我要遍历并根据计算为每个条指定颜色.为此，我创建了一个带有#个垃圾箱和一个最小/最大值的颜色图，获取了颜色索引，然后最终获取了rbg值.尝试应用颜色时出现以下错误:

Similar to the MATLAB example, I first create my bar graph. Next, I want to loop through and prescribe the color for each bar based on a calculation. I do this by creating a colormap with # of bins and a min/max, getting a color index, then finally retrieving the rbg value. I get the following error when I try to apply the color:

下标索引必须是实数正整数或逻辑.

h.CData(n，:) = rbg;

如果我深入研究h对象，MATLAB会告诉我CData的大小为(4x65).这里发生了什么? new_edge和N都是1x65向量.

If I dive into the h object, MATLAB tells me that CData has a size of (4x65). What's going on here? Both new_edge and N are 1x65 vectors.

推荐答案

这可能与您的Matlab版本有关. 当我在2017b上使用bar测试CData时，此方法有效:

This could be a problem with your Matlab version. When I test CData with bar on 2017b, this works:

openExample('graphics/ControlIndividualBarColorsExample')

当我在2017a上尝试时，它没有运行. 这个例子有用吗?

When I try it on 2017a, it doesn't run. Does the example work?

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