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我有一个条形图(2D),我想让另一个向量的值 > 1 的部分的背景变为红色,即

例子:

图 = [2 3 5 4 9 1 7] 颜色 = [0 2 2 1 0 1 2]

因此条形图将显示通常的条形图,并且后面的背景(包括条形图之间的空间)在“3”、“5”和“7”(位置 2、3、7)的条形后面是红色的

蓝色示例: 蓝色 bg 图

这有可能吗?

谢谢

4

2 回答 2

4

是的,这是可能的

%# define some parameters
backgroundColor = 'r';
backgroundWidth = 0.9;
foregroundWidth = 0.3;

%# collect the data
graph = [2 3 5 4 9 1 7];
color = [0 2 2 1 0 1 2];

x = 0:length(graph)-1;
colIdx = color>1;
bgBarHeight = max(graph)+1; %# background bars are 1 taller than max

%# first, plot red bars - I plot them as background as in your question, 
%# not as transparent overlay as in your example (see yuk's answer for that)
bar(x,colIdx*bgBarHeight,backgroundWidth,'FaceColor',backgroundColor,'EdgeColor','none')

%# use hold on to prevent background from disappearing
hold on

%# then, plot foreground bars. Use hold on so that the background isn't lost
bar(x,graph,foregroundWidth,'FaceColor','k')

%# label the axes
xlabel('X Axis')
ylabel('Y Axis')
于 2010-07-10T00:38:16.430 回答
3

稍微修改 Jonas 代码以使背景栏透明并更正一些错误:

%# define some parameters
foregroundColor = 'k';
backgroundColor = 'r';
foregroundWidth = 0.3;
backgroundWidth = 0.9;

%# collect the data
graph = [2 3 5 4 9 1 7];
color = [0 2 2 1 0 1 2];

x = 0:length(graph)-1;
colIdx = color>1;
bgBarHeight = max(graph)+1; %# background bars are 1 taller than max

%# first, plot foreground bars
b1 = bar(x,graph,foregroundWidth,'FaceColor',foregroundColor);
hold on
%# then, plot background bars. 
%# they will overlap foreground bars, but we'll make them transparent later
b2 = bar(x,colIdx*bgBarHeight,backgroundWidth,'FaceColor',backgroundColor,'EdgeColor','none');
hold off

%# make background bars transparent
pch = get(b2,'child'); %# get patch objects from barseries object
set(pch,'FaceAlpha',0.3); %# set transparency

xlabel('X Axis')
ylabel('Y Axis')
于 2010-07-10T19:11:27.480 回答