Stephen23

Aktiv seit 2014

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How to merge two tables into a single table?
Assuming that the tables already exist: table1 = table(["Smith";"Nguyen";"Williams";"Fernandez";"Brown"],[38;43;38;40;49], ... ...

etwa 2 Stunden vor | 0

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saving struct empty give me error
"hi, it's possibile to save empty struct? How can i do it?" Of course, just give the variable name exactly like you would any o...

5 Tage vor | 0

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trying to extract the months to create a format looks like 202404, how to do that ?
s = ""; % your string array dt = datetime('now') dt.Format = 'MMM yy'; % the format given in your example code s(1) = dt dt....

5 Tage vor | 0

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How can I insert a variable into a plot legend, with a special character following the variable?
Using STRING: plot(rand(5,4)) m = pi; legend('','','',"Gradient: "+m+"\circ/mm") Using CHAR: plot(rand(5,4)) m = pi; t = ...

7 Tage vor | 0

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Beantwortet
Lineanchor not working in regexp
My guess is that you have not taken the newline characters into account. Note the difference: tx1 = sprintf('Hello\r\nWorld'); ...

7 Tage vor | 0

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How do I convert a decimal number of months to a datetime format?
"The only way I can think of is manually converting by identifying the length of the month the offset represents." Let MATLAB d...

8 Tage vor | 1

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How can I keep the first two elements from CSV values in a string
S = ["";"philosopher,historian,writer,political activist,literary critic";"philosopher";"philosopher,writer"] T = regexp(S,'^[^...

12 Tage vor | 0

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How to compute mean value of a field in a struct?
Rather than nesting lots of separate structures in a cell array, why not just use one structure array?: C = load('featuresnew.m...

13 Tage vor | 0

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Beantwortet
splitting a vector into separate vectors
A much better approach using a cell array: V = [2,2,2,2,2,4,4,4,7,7,8,9] L = diff(find([1,diff(V),1])) C = mat2cell(V,1,L)

14 Tage vor | 0

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Concatenating Mixed numbers looses the decimal places
"How can I retain the decimal numbers " A = [n,double([MaxI,MinI]),medianMaxIntensity, Hlg,Bren,fwhm2D]; % ^^^^^^^^ ...

19 Tage vor | 0

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How do I do char2num (assume Ascii)?
https://www.mathworks.com/help/matlab/matlab_prog/unicode-and-ascii-values.html txt = char(120:122) num = double(txt) If you ...

20 Tage vor | 0

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Beantwortet
writematrix: how to get formatted txt-output?
M = [100,0,4500;0,1,38.29;1,1,38.22] S = join(compose("%10.2f",M),''); writelines(S,"test.txt") Checking: type test.txt

20 Tage vor | 0

Gesendet

Convert between RGB and Color Names
RGB to color name. Color name to RGB. Supports many palettes: CSS, dvips, HTML, MATLAB, RAL, SVG, X11, xcolor, xkcd,...

21 Tage vor | 25 Downloads |

Beantwortet
Random number vector with only two values
Indexing is a basic MATLAB superpower. You can easily use indexing to select from a vector of any values: V = [0,pi]; W = V(ra...

21 Tage vor | 1

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Beantwortet
Character string to numeric vector
txt = ' ( 0.0357 -0.0001 0.0051) ' vec = sscanf(txt(3:end),'%f',[1,3]) or vec = sscanf(strtrim(txt),'(%f%f%f',[1,3])

24 Tage vor | 0

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how to delete the files in a folder using matlab?
delete(fullfile(inpath,baseGran,'sigma*.img'))

24 Tage vor | 1

Beantwortet
Looping string array into parsed timestamp
"... that is causing issues with the indexing." Because you are mixing up indexing into string arrays with the characters conta...

27 Tage vor | 1

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Combining text with non-zero elements of a 2D array
Without an intermediate matrix: N = [10,0,0,0,0;,0,20,0,0,0;,10,0,20,0,0;,0,0,0,10,0;,0,0,0,0,30] C = {'ABC';'DEF';'GHI';'JKL'...

28 Tage vor | 0

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Beantwortet
In a table, when I try assigning a value to a new column based on some criteria, I get error that "assignment to elements using simple assignment statement is not supported"
"I don't think I should need a for loop to iterate through each row and replace the value at the "indx" location" You do not ne...

28 Tage vor | 0

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Beantwortet
How to replace values in a table with the outputs of another code?
Use curly brace indexing to access the content of the table: https://www.mathworks.com/help/matlab/matlab_prog/access-data-in-a...

etwa ein Monat vor | 0

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Beantwortet
Matlab function only giving me 1 output
"why is my Vmax just giving me 1 value." Because you used mrdivide / (matrix right division) instead of rdivide ./ (array right...

etwa ein Monat vor | 2

Beantwortet
Customizing plots that are matrices of column vectors?
X = 1:9; Y = rand(9,2); S = scatter(X,Y); set(S,{'Marker'},{'o';'*'})

etwa ein Monat vor | 1

Beantwortet
How to use lazy quantifiers in look ahead?
Regular expressions are the wrong tool for this. It might be possible with some effort, but personally I would just use the corr...

etwa ein Monat vor | 0

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Gesendet

Interactive Regular Expression Tool
Develop and refine regular expressions in an interactive figure that shows all of REGEXP's outputs.

etwa ein Monat vor | 12 Downloads |

Beantwortet
Loop through a table using a specific condition and generate new table satisfying the particular condition
ID = ["ID1";"ID1";"ID2";"ID3"]; Value = [5;7;3;1]; T = table(ID,Value) G = groupsummary(T,'ID','sum')

etwa ein Monat vor | 0

Beantwortet
locate within the first column of a matrix a sequence of numbers and extract those rows
Use DIFF, which is a key MATLAB function. M = load('M.mat').M X = diff([0;find(diff([M(:,1);0])<0)]); Y = size(M,2); C = mat...

etwa 2 Monate vor | 0

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Beantwortet
Rearrange elements of matrix based on an index matrix
Yes, it is awkward. x=randn(5,3) z=randn(5,3) [~,I] = sort(x,2) Perhaps S = size(I); [R,~] = ndgrid(1:S(1),1:S(2)); J = s...

etwa 2 Monate vor | 0

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Is this a bug of MATLAB?
"I think the correct answer should be longer. Is it a bug or an expected behavior?" It is not a bug: the default number of dig...

etwa 2 Monate vor | 1

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Beantwortet
converting string to num and table
Tip for the future: upload your raw data, not a data extract that you have already imported and modified. S = load('sample1.mat...

etwa 2 Monate vor | 1

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Beantwortet
Faster alternate to all() function
N = 10000; varname = rand(246658,4) idxkeep = randi(size(varname,1),1,N); tic for i=1:N idx = idxkeep(i); idy = ...

etwa 2 Monate vor | 1

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