i need a program in matlab..??
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I have values like:
0-56 it should multiply with 92.5,
57-112 it should multiply with 95.2,
113-168 it should multiply with 95.8,
169-225 it should multiply with 95.9.
I need a program for these conditions. Please help me friends...
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回答（3 个）
Walter Roberson
2015-5-21
0 个投票
histc with the two outputs to figure out which range you are in. Use the bin number to index a vector of constants to multiply.
5 个评论
nani kalyan
2015-5-21
编辑：nani kalyan
2015-5-21
Joseph Cheng
2015-5-21
did you read the document of histc? the examples in the documentation can be adapted to:
test = 1:15;
binranges = [1 5 10 16];
[N bincounts] = histc(x,binranges)
output = zeros(size(x));
for ind = 1:length(binranges)-1
output(bincounts==ind) = x(bincounts==ind)*ind;
end
nani kalyan
2015-5-21
Joseph Cheng
2015-5-21
x should be test. I was rushed but i'm sure you could have figured that out.
nani kalyan
2015-5-21
Andrei Bobrov
2015-5-21
a = [92.5,95.2,95.8,95.9]';
x = randi(225,15,1);
[~,ii] = histc(x,[0,57,113,169,225]);
out = x.*a(ii);
2 个评论
nani kalyan
2015-5-21
Walter Roberson
2015-5-21
Use xlsread() to read column 3 of the file, and assign the values to x.
Image Analyst
2015-5-21
Here's another approach that does what (I think) you said :
% Make up some sample data
numElements = 100;
maxValue = 200; % Whatever
% Create sample data.
data = maxValue * rand(1, numElements);
% 0-56 it should multiply with 92.5,
% 57-112 it should multiply with 95.2,
% 113-168 it should multiply with 95.8,
% 169-225 it should multiply with 95.9.
% Do the algorithm.
% 0-56 it should multiply with 92.5,
logicalVector = data >= 0 & data < 56;
data(logicalVector) = data(logicalVector) * 92.5;
% 57-112 it should multiply with 95.2,
logicalVector = data >= 57 & data < 112;
data(logicalVector) = data(logicalVector) * 95.2;
% 113-168 it should multiply with 95.8,
logicalVector = data >= 113 & data < 168;
data(logicalVector) = data(logicalVector) * 95.8;
% 169-225 it should multiply with 95.9.
logicalVector = data >= 169 & data < 225;
data(logicalVector) = data(logicalVector) * 95.9;
Note that if your data is floating point, there are some gaps in your ranges, like values between 56 and 57 don't get multiplied by anything. However if you just have integers, that's not a problem
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2015-5-21
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