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Last seen: 1 jour ago Active since 2019

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Question

How to count the number of rows per group
Hi, I simply want to count the number of rows per group (for unique combinations of a, b and c). Groups where either a, b, or c ...

7 jours ago | 1 answer | 0

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If-function in tables does not work
If I understand correctly, the cyclist has answered this question: https://www.mathworks.com/matlabcentral/answers/321819-how-to...

5 mois ago | 0

Question

How to assign multiple categories based on the mean of multiple groups
Hi, I want to assign categories based on the mean variable of multiple groups in the table below. For each unique combination ...

7 mois ago | 0 answers | 0

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Question

How to merge two variables together in a table
Hi, I have a quick question : I have an initial table T and I would like to merge the variables deph1 and deph2 into a single ne...

8 mois ago | 1 answer | 0

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Question

How to get rid of an extra space added by getSnapshotImage
Hello, getSnapshotImage seems to be adding an extra space in the annotation of my figures. In the dummy plot below there is no ...

10 mois ago | 1 answer | 0

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How do I get time in input?????
You mean like this ? You can enter time as '23:45' for example prompt = 'What time is it ? '; t = datetime(input(prompt), 'For...

11 mois ago | 0

Question

How to modify the size of images in a report
Hello, I am struggling to add images of the correct size in a report (https://www.mathworks.com/matlabcentral/answers/1563981-h...

12 mois ago | 1 answer | 0

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Question

How to increase the size of figures in Report Generator
Hello, I want to have 2 figures per page in my report but I cant figure out how to maximize the size of my figures so that I am...

12 mois ago | 0 answers | 0

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Question

How to save a figure of a specific size with exportgraphics
Hello, I simply want to export a figure of a specific size (6 x 9 inches) with the function exportgraphics as described here (h...

12 mois ago | 1 answer | 0

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Question

How to conditionally merge multiple variables in a table
Hi, In the table t below I would like to merge the variables var_c, var_d and var_e into a single new variable called new_var. ...

environ un an ago | 1 answer | 0

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Question

How to use sqlwrite
Hi, I am running into some problems with sqlwrite. I am trying to duplicate the example found here (https://www.mathworks.com/h...

environ un an ago | 1 answer | 0

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Question

How to conditionally format a variable with fprintf
Hi, Quick question: a want to contionally format a variable so that there are 2 decimals for all numbers except for 0; 0 should...

environ un an ago | 1 answer | 0

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What functions should be moved to basic MATLAB?
Hi Walter, Im tempted to say shaperead from the Mapping Toolbox. Yes, I know shaperead is a big part of the Mapping Toolbox but...

plus d'un an ago | 1

What’s wrong?
Is this what you want ? Works fine. t = 0:1/6000:1/30 v = (4*cos((120*pi*t) + (pi/3))) plot(t,v)

plus d'un an ago | 0

Question

How to subsample a dataset per week
Hi, I would like to subsample a dataset in such a way as to keep only the data that was collected on the first sampled day of t...

plus d'un an ago | 1 answer | 0

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Question

How to transform multiple sets of coordinates in a csv file into a single shapefile
Hi, I was wondering what was the easiest way to transform the coordinates of multiple polygons in a csv file into a single shap...

plus d'un an ago | 1 answer | 0

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Question

How to conditionally merge rows in a table
Hi, I have a quick question - I have the following table T and I would like to merge the rows where the values of the variabl...

plus d'un an ago | 1 answer | 0

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Question

How to replace leading zeroes by spaces with regexprep
Hi, I have a basic question. I simply need to replace the leading zeroes by empty spaces in table T except for the last zero wh...

environ 2 ans ago | 3 answers | 0

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Question

How to duplicate the number of rows in a table based on frequency
Hi, I have a frequency table like this where N is the number of occurences: id = [1004, 1004, 1004, 1004]'; length = [23, 45,...

plus de 2 ans ago | 1 answer | 0

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Question

Fastest way to replace NaNs by empty cells in a table
Hi, I need to replace the NaNs in the columns a and b by empty cells. The code below works but it is pretty slow. Is there a fa...

plus de 2 ans ago | 1 answer | 0

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Question

How to reformat a table
Hi, My problem is very straightforward: i need to transform T1 into T2. What is tricky about this (in my mind anyway) is that s...

plus de 2 ans ago | 1 answer | 0

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Question

How to condionally keep unique rows in a table
Hi, I have the following table T and I would like to keep only the rows that are unique based on the combination of the variabl...

plus de 2 ans ago | 1 answer | 0

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Question

How to modify decimal places when exporting data with fprintf
Hi, I have a mixed-type table T that I want to export as a txt file. But I also need to change the number of decimals of T.d to...

plus de 2 ans ago | 2 answers | 0

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Question

How to do basic time arithmetic when NaNs are involved
Hi, I have the following table and I simply want to calculate the elapsed time between start and end points. My main problem is...

plus de 2 ans ago | 1 answer | 0

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Question

Fastest way to read mixed-type and position-delimited text files
Hi, I need to convert mixed-type text files that are position-delimited into cell arrays. To do this, I have a reference file w...

plus de 2 ans ago | 1 answer | 0

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Question

How to use ismember to assign values from one cell array to another cell array
Hi, I have two cell arrays of unequal lengths x = {'C', 'A', 'B', 1; 'C', 'A', 'B', 1; 'C', 'A', 'B', 2; 'B', 'A', 'D', 5} ...

plus de 2 ans ago | 1 answer | 0

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Question

How to conditionally delete columns in a cell array
Hi, I have a simple cell array that look like this: input = {'A','B','A','A','A','A','A','A'; 'A','A','B','A','A','A','A','A'...

plus de 2 ans ago | 2 answers | 0

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Question

How to replace values above a given percentile by nans
Hi, I am trying to replace values above the 99th percentile in a table by nans by using Star Strider excellent little function ...

environ 3 ans ago | 2 answers | 0

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Question

How to reshape every cell in a structure
Hi, I am trying to reshape every cell in a 1x4 structure with 10 fields. A simplified example would look like this but when I t...

environ 3 ans ago | 1 answer | 0