我想用这个创建一个三维表面:
>> a=X
a =
Columns 1 through 8
0 50 100 150 200 250 300 350
Columns 9 through 16
400 450 500 550 600 650 700 750
Columns 17 through 21
800 850 900 950 1000
>> b=Y
b =
0
50
100
150
200
250
300
350
400
>> c=Z
c =
Columns 1 through 8
0 0 0 0 0 0 0 0
16 32 67 98 127 164 194 234
120 171 388 773 1086 1216 1770 2206
189 270 494 1978 2755 3134 5060 10469
133 166 183 348 647 937 1446 2304
192 162 154 113 161 189 266 482
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
Columns 9 through 16
0 0 0 0 0 0 0 0
366 604 529 504 346 226 228 179
4027 11186 10276 5349 2560 1322 996 799
27413 76387 37949 15591 5804 2654 1803 1069
9844 24152 14772 4613 1777 849 459 290
1288 2623 1538 582 280 148 90 56
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
Columns 17 through 21
0 0 0 0 0
108 94 79 0 0
646 476 612 0 0
884 858 722 0 0
266 215 139 0 0
48 48 31 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
>> surf(X,Y,Z)
同时我想定义Z值< = 1803将在表面图上以红色显示,1803< Z< 2755黄色和Z> = 2755绿色。颜色条的限制可以是Z的最小值和最大值(从0到76387)。如何设置颜色条的范围以获得此结果?
答案 0 :(得分:2)
这将按照您的要求执行:
%# add red (row 1), yellow (row 2), green (row 2)
map = [1 0 0; 0 1 1; 0 1 0];
%# set the new map as the current map
colormap(map);
colors = zeros(size(c)); %# create colors array
colors(c <= 1803) = 1; %# red (1)
colors(c > 1803 & c < 2755) = 2; %# yellow (2)
colors(c >= 2755) = 3; %# green (3)
%# and pass it into surf
surf(a,b,c, colors)