Answered
Regular expression forward slash clarification
The slash is a basic literal. They wanted to work with roughly the same example for the three cases, and they built a pattern wh...

11 years ago | 2

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Answered
How to read the PRE html tags and replace some white spaces
I've got to run, but here is one way (I'll come back later to discuss further if needed). *EDIT:* the first solution could no...

11 years ago | 3

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How do I call the first number in a string?
If the text just contains letters followed by numbers, an efficient way to proceed is as follows; num = string - '0' ; f ...

11 years ago | 3

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Read csv strings, keep or create surrounding whitespace
Here is an example that I can refine if you provide more information. It writes some keywords in upper case.. key = {'lobste...

11 years ago | 1

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Answered
Convert cell-array to array-of-cells, for array-of-struct creation?
To = cellfun( @(cc)num2cell(cc), Fr, 'UniformOutput', false ) ; To = [To{:}] ;

11 years ago | 1

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Convert space separated string table to cell?
>> Dec = reshape( hex2dec( regexp( reshape( Table', 1, [] ), '..\s?', ... 'match' )), 8, [] )' Dec = 162 ...

11 years ago | 4

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Answered
How can I create another matrix with the sum of every 30 rows in a 14,400 by 11 matrix?
Here are a couple additional ways, if you need a sum for each block of 30 days (not a "moving" sum), assuming that your original...

12 years ago | 1

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Creating a diagonal matrix which contains already defined matrix on diagonals??
Here is an example which builds a block diagonal matrix |A| based on 3x3, trivially time-dependent matrices t = 0 : 3 ; ...

12 years ago | 1

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How can I plot the same data with two y-axes on the same plot?
You probably made a mistake, how are you calling PLOTYY? doc plotyy and look at examples, and e.g. the following which wo...

12 years ago | 2

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Remove elements appearing sequentially in a larger text.
Here is an example using pattern matching and replacement.. % - Get and modify content. fName = 'tord_1.txt' ; content...

12 years ago | 2

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Clear text typed with input() from the command history
It may be a bit violent but com.mathworks.mlservices.MLCommandHistoryServices.removeAll would work. And welcome back! ...

12 years ago | 1

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Relatively complex matrix indexing question
You are correct about sparse matrices, and I had completely misunderstood your setup! So the lower triangular part is NaN, but t...

12 years ago | 1

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Answered
How to create average of values within a grid box??
You are trying to perform what is called a <http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//009z000000w8000000.ht...

12 years ago | 6

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Answered
How to import large textfile
Here is one way to proceed fId = fopen( 'omar_1.txt', 'r' ) ; buf = fscanf( fId, '%f', Inf ) ; fclose( fId ) ; bSize...

12 years ago | 2

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Answered
How to pass a function handle of an anonymous function into ode45 function in matlab?
Assuming that your problem has 3 dimensions, so you have for example x0 = [10; 5; 7] ; % [x1(0), x2(0), x3(0)], or...

12 years ago | 6

Question

Why not making accounts creation more complicated?
We've seen a *dramatic* increase of the spam that we get on the forum lately, and I am wondering if it isn't the right moment fo...

12 years ago | 2 answers | 12

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answers

Answered
How to extract a number of diagonals of a matrix
*Sparse, SPDIAGS* - Here is a version using sparse matrices and SPDIAGS Original, dense matrix: >> N = 5 ; >> A = randi...

12 years ago | 4

Answered
Split along word into parts with different lengths
Here is a solution based on comments above. Yet, we will need you to answer these comments so we can refine the approach. Assumi...

12 years ago | 3

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Answered
Find duplicate entries and average associated values
If elements from the first column are "continuous" positive integers, here is a way to go: >> data = [1 10; 2 20; 3 30; 4 40...

12 years ago | 5

Answered
Read specific hex data in CSV file
*NEW solution* Here is a more efficient solution; I am using a 122MB file, so you have an idea about the timing % One lin...

12 years ago | 3

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Answered
Find elements greater than a value corresponding to the second array
loc = B > 0.875 ; % Logical index of elements of B greater than 0.875. val = A(loc) ; % Values of A at...

12 years ago | 2

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Answered
Split one array into two while splitting each cell
Assuming that you have data = {'13008KT', '08009KT', '13009KT', '13008KT'} ; here one way to go: >> data = cat( 1, ...

12 years ago | 2

Answered
after fundamentals what is the next course for a physics student?
I don't have much time but I'll bring my 2 cents too, and develop two points. *A.* You have to make the distinction between t...

12 years ago | 2

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Answered
Using textscan with mixed data type in a single field/array
If you don't need |N| and |T|, the simplest approach is probably to eliminate them before the call to TEXTSCAN: content ...

12 years ago | 4

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Answered
Reading values from a text file and converting to array.
Here is one way to achieve what you want to do: >> content = fileread( 'myFile.txt' ) ; >> data = textscan( content, '%f (...

12 years ago | 3

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Answered
textscan difficulties with mixed datatypes
Why do you get the CSV content as a cell array of rows? If you cannot change this, you could just merge/concatenate all these ro...

12 years ago | 3

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Answered
Fast way to read text file of formatted data
You should/could perform this operation using a *RAM drive/disk*. There is little interest in saving temporary files on disk whe...

12 years ago | 2

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String value and relate with number.
Here is one solution. Assuming W = ['DABCD'] ; Define values = [21, 12, 8, 7] ; % or values = [A, B,...

12 years ago | 1

Answered
How to present elements of a cell array?
s1n = reshape(sscanf([s1{:}],'%s%d'),3,[]) ; s2n = reshape(sscanf([s2{:}],'%s%d'),3,[]) ; [id2,id1] = find(bsxfun(@eq,s1n(3...

12 years ago | 2

Answered
Track changes in a cell array with strings
Here one way to proceed: [~,ia] = unique( arrayfun( @(r)[C{r,2:end}], 1:size(C,1), 'Unif', 0 )) ; C_chg = C(sort(ia),:) ...

12 years ago | 3

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