根据条件，图形背景的颜色指定区域
 

我有一个条形图（2D），我想将背景的红色设为另一个向量的值大于1的部分，即

例：

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

因此该条形图将显示通常的条形，并且其后面的背景（包括条形之间的空间）在“ 3”，“ 5”和“ 7”的条形后面（位置2、3、7）被涂成红色。

蓝色示例： [URL="https://i.stack.imgur.com/SMY5w.jpg"][IMG]https://i.stack.imgur.com/SMY5w.jpg[/IMG][/URL]

有可能吗？

谢谢



[B]回答：[/B]

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')

[url=https://stackoverflow.com/questions/3216772]更多&回答...[/url]