Why I the data processed by the matlab is wrong, it reports three wrong results,what is the reason?All the data and .m files are included ,who can help me?

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huazai2020 2020-6-24

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评论： Stephen23 2020-7-6

error.zip

Why I the data processed by the matlab is wrong, it reports three wrong results,what is the reason?All the data and .m files are included ,who can help me?

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darova 2020-6-25

Don't understand the question. Everything looks correct

huazai2020 2020-6-25

You see the yellow word， the left are the primary data，the right are the process data， you see they are different, what is the reason?

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Image Analyst 2020-6-25

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The display looks a little different but that's probably just due to the third column not being wide enough to show the same number of digits. Grab the divider line between the columns and widen it. It should look the same after that.

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huazai2020 2020-6-25

No， the value are not the same， the left is 0.58（Decimal）， the right is 58469706（interger）， they cannot be the same.You can use my data to have a try, you can find my problem.

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Fangjun Jiang 2020-6-25

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This is probably the limitation of the smartness of the importdata() function.

If you look at filec.textdata, you will get a clue. It tries to separate the data based on 'line-10'. 'line-10' is read in correctly. All the lines below, either the digit "0" or "0." are treated and included in as the text data.

So for 'line-20', "0" is truncated but ".5474641" is still read in as "0.5474641"

for "line-30', "0." is truncated thus "59778373" is read in as "59778373"

For your input file text format, it's better to use textscan(), although it can't be done with one line of code.

For this particular file "'tem-009.out'", I tried A=readmatrix(filename,'filetype','text') and it does give correct result.

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huazai2020 2020-7-5

Can I updata it directly to r2020a, or I should download a new one and setup it again.

What is the difference of importdata() or csvread() or dlmread()? Thank you.

Image Analyst 2020-7-5

csvread() reads only comma separated values. dlmread() can have other delimiters in addition to commas. importdata() tries to be a smarter function than either of those two in that the data can be more complicated and it will try to figure it out.

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Stephen23 2020-6-25

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tem-009.txt

opt = {'CollectOutput',true };
[fid,msg] = fopen('tem-009.out','rt');
assert(fid>=3,msg)
str = '';
while ~strncmp(str,'-',1)
    str = fgetl(fid);
end
C = textscan(fid,'line-%f%f',opt{:});
fclose(fid);
M = C{1};

Giving:

>> M
M =
0000    0.7539
0000    0.5475
0000    0.5978
0000    0.3828
0000    0.5847
0000    0.1664
0000    0.2465
0000    0.5116
0000    0.3211
0000    0.3744
0000    0.6611