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George


MathWorks

173 2014 이후 총 참여 횟수

I've worked at MathWorks since 2013. Using MATLAB isn't part of my job, but I enjoy learning about it.

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Return unique values without sorting
If the input vector A is [42 1 1], the output value B must be the unique values [42 1] The *values of B are in the s...

3년 이하 전

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Generate N equally spaced intervals between -L and L
Given N and L, return a list of numbers (in ascending order) that divides the interval [-L L] into N equal-length segments. F...

3년 이하 전

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Set the array elements whose value is 13 to 0
Input A either an array or a vector (which can be empty) Output B will be the same size as A . All elements of A equal to 13...

3년 이하 전

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How can I create a cell array by combining arrays?
What are you having trouble with? The code you posted works. >> cellArray={['X','Y','Z'],[1 2 3],[4 5 6],[7 8 9]} c...

3년 이하 전 | 1

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Using save with -v7.3 takes a long time and the mat file size is enormous
I've run into this before too. From the <https://www.mathworks.com/help/matlab/import_export/mat-file-versions.html matfile> pag...

3년 이하 전 | 0

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How do I get Matlab to recognise a text file as numerical values when importing it ?
Check out the <https://www.mathworks.com/help/matlab/ref/textscan.html#inputarg_formatSpec |formatSpec|> portion of the textscan...

3년 이하 전 | 0

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how to get the specific member data from a struct array?
From the doc on <https://www.mathworks.com/help/matlab/ref/struct.html |struct|> "When you access a field of a nonscalar stru...

3년 이하 전 | 0

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predict data for input
Have you tried <https://www.mathworks.com/help/stats/compactclassificationdiscriminant.predict.html |predict()|>? results =...

3년 이하 전 | 0

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I'm trying to create a loop in which i can extract 4 columns and multiple rows from 18 difference txt files and save the extracted data in one file. Is this possible? This is my code from one file
Untested, but this should basically work. Get an array of filenames with <https://www.mathworks.com/help/matlab/ref/ls.html?s_ti...

3년 이하 전 | 0

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How can I make a random array with values of either -1 or 1?
You can use rand % pseudo code x = rand(50,1); pos = x >= .5; neg = x < .5; x(pos) = 1; x(neg) = -1; ...

3년 이하 전 | 0

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Elapsed Time
Given two date strings d1 and d2 of the form yyyy/mm/dd HH:MM:SS (assume hours HH is in 24 hour mode), determine how much time, ...

약 3년 전

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Binary numbers
Given a positive, scalar integer n, create a (2^n)-by-n double-precision matrix containing the binary numbers from 0 through 2^n...

약 3년 전

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How to remove corrupted data lines from text file
Add a NameValue pair of <https://www.mathworks.com/help/matlab/ref/textscan.html#namevaluepairs CommentStyle>. e.g., C = t...

약 3년 전 | 0

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Counting Money
Add the numbers given in the cell array of strings. The strings represent amounts of money using this notation: $99,999.99. E...

약 3년 전

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Sums with Excluded Digits
Add all the integers from 1 to n in which the digit m does not appear. m will always be a single digit integer from 0 to 9. no...

약 3년 전

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Multielement indexing of a row array
The row array birthRateChina stores the China birth rate (per 1000 people) for years 2000 to 2012. Write a statement that create...

약 3년 전

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How to set names to column vectors?
If you want to associate a variable name with a piece of data I think your best bet is to use a <https://www.mathworks.com/help/...

약 3년 전 | 1

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해결됨


Replace NaNs with the number that appears to its left in the row.
Replace NaNs with the number that appears to its left in the row. If there are more than one consecutive NaNs, they should all ...

약 3년 전

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How to speed up a for loop ?
Are you sure this is correct? angle=asin(A(:,3))/(sqrt(A(:,3).^2+A(:,2).^2+A(:,1).^2)); That's doing matrix division. In...

약 3년 전 | 2

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How to find which column consists character 'example' in cell c{1,2}(:,1)
strcmp(c{1,2}(:,1), 'example') will return a logical array. You may need to surround 'example' with |cellstr()|, I can't re...

약 3년 전 | 0

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how to convert minute rainfall to daily rainfall with missing value?
This assumes you can get the data into the tables you want. Here is a way if you have data in one station per file. ds = da...

약 3년 전 | 0

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Replace a missing string in a table
This should work: dblVar = [NaN; 3; 7; 9]; cellstrVar = {'one'; 'three'; ''; 'nine'}; categoryVar = categorical({''; ...

약 3년 전 | 1

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How to process multiple txt files in a loop?
Get an array of file names and loop over that array. e.g., files = ['file1.txt' 'file2.txt' 'file3.txt']; for ii = 1:nu...

약 3년 전 | 3

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How do I calculate a mean value of a vector and ignore from the "0" when appears inside the vectors?
Replacing the 0s with NaN and using the 'omitnan' flag should do what you want. >> A A = NaN NaN...

약 3년 전 | 0

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How can i rotate Confusion Matrix?
ax = gca; ax.XAxisLocation = 'top'; You can also do this with the set command, but I think the above is more clear.

약 3년 전 | 0

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Merge Date and Time in Tall Tables
Try adding them together. <https://in.mathworks.com/help/matlab/matlab_prog/compute-elapsed-time.html Examples>.

약 3년 전 | 0

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Extract values from single data matrix
Take a look at <https://www.mathworks.com/help/matlab/ref/horzcat.html |horzcat|> and <https://www.mathworks.com/help/matlab/ref...

약 3년 전 | 0

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How can I count frequency in array?
<https://www.mathworks.com/help/matlab/ref/fprintf.html |fprintf|> prints to a file. You want to use <https://www.mathworks.com/...

약 3년 전 | 2

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