Respondida
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...

más de 11 años hace | 2

| aceptada

Respondida
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...

más de 11 años hace | 3

| aceptada

Respondida
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 ...

más de 11 años hace | 3

Respondida
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...

más de 11 años hace | 1

| aceptada

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

más de 11 años hace | 1

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

más de 11 años hace | 4

| aceptada

Respondida
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...

más de 11 años hace | 1

Respondida
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 ; ...

más de 11 años hace | 1

Respondida
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...

más de 11 años hace | 2

Respondida
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...

más de 11 años hace | 2

Respondida
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! ...

más de 11 años hace | 1

Respondida
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...

más de 11 años hace | 1

| aceptada

Respondida
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...

más de 11 años hace | 6

| aceptada

Respondida
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...

más de 11 años hace | 2

| aceptada

Respondida
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...

más de 11 años hace | 6

Pregunta

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...

más de 11 años hace | 2 respuestas | 12

2

respuestas

Respondida
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...

más de 11 años hace | 4

Respondida
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...

más de 11 años hace | 3

| aceptada

Respondida
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...

más de 11 años hace | 5

Respondida
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...

más de 11 años hace | 3

| aceptada

Respondida
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...

más de 11 años hace | 2

| aceptada

Respondida
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, ...

más de 11 años hace | 2

Respondida
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...

más de 11 años hace | 2

| aceptada

Respondida
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 ...

más de 11 años hace | 4

| aceptada

Respondida
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 (...

más de 11 años hace | 3

| aceptada

Respondida
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...

más de 11 años hace | 3

| aceptada

Respondida
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...

casi 12 años hace | 2

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

casi 12 años hace | 1

Respondida
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...

casi 12 años hace | 2

Respondida
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),:) ...

casi 12 años hace | 3

| aceptada