What is going wrong with this code
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wves=xlsread('Data_all.xlsx','Wave_data');
c=wves(3:end,Waves);
disp(c)
WH01=0;
WH23=0;
WH45=0;
WH67=0;
WH89=0;
WH1011=0;
WH1213=0;
for i = 0:1:498
if (c(i) == 0) || (c(i) == 1)
WH01=WH01+1;
elseif (c(i) == 2) || (c(i) == 3)
WH23=WH23+1;
elseif (c(i)==4) || (c(i)==5)
WH45=WH45+1;
elseif (c(i)==6) || (c(i)==7)
WH67=WH67+1;
elseif (c(i)==8) || (c(i)==9 )
WH89=WH89+1;
elseif (c(i)==10) || (c(i)==11)
WH1011=WH1011+1;
elseif (c(i)==12) || (c(i)==13 )
WH1213=WH1213+1;
end
end
4 个评论
Sriram Tadavarty
2020-4-25
Replace c(i) with c(i+1), or start i in the for loop from 1 rather than 0. MATLAB indexing is 1 based.
Themistoklis Pytharides
2020-4-25
Walter Roberson
2020-4-25
Also Waves does not appear to be defined.
Themistoklis Pytharides
2020-4-25
回答（2 个）
dpb
2020-4-25
>> n=arrayfun(@(i1,i2) sum(iswithin(c,i1,i2)),0:2:13,1:2:13)
n =
14 15 10 14 14 17 16
>> type iswithin
function flg=iswithin(x,lo,hi)
% returns T for values within range of input
% SYNTAX:
% [log] = iswithin(x,lo,hi)
% returns T for x between lo and hi values, inclusive
flg= (x>=lo) & (x<=hi);
>>
Presuming the magic number 498 is numel(c)-1
This should be a job for one of the histogram functions, but there's no way Io make one of them use the inclusive bin edges to count the two end points within the bin even for nonoverlapping data
2 个评论
Steven Lord
2020-4-25
h = histcounts(c, 0:2:14)
The first bin corresponds to [0, 2) which for integer c data means it captures c = 0 and c = 1. The last bin corresponds to [12, 14] which captures c = 12 and c = 13 (and would capture c = 14, but the question implies that c only contains integer values between 0 and 13 inclusive.)
dpb
2020-4-25
I thought I had done that, Steven...[search command history....] Oh! I had tried to use 1 to capture inclusive. I don't see why my attempt at using a tolerance -- oh, I do now.
I just wasn't thinking about the [0, 2) definition correctly.
Thanks for setting me straight...
dpb
2020-4-25
Alternate solution:
ix=kron([1:numel(0:13)/2].',ones(2,1));
n=accumarray(ix(c+1),ones(size(c)));
>> n
n =
14
15
10
14
14
17
16
>>
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2020-4-25
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