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# Blue

##### Last seen: 7 días ago
36 total contributions since 2019

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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)

3 meses 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...

3 meses 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...

4 meses 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...

4 meses 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...

10 meses 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,...

11 meses 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...

11 meses 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...

11 meses 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...

12 meses 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...

12 meses 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...

12 meses 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...

alrededor de 1 año 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} ...

alrededor de 1 año 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'...

alrededor de 1 año 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 ...

más de 1 año 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...

más de 1 año ago | 1 answer | 0

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Question

How to reshape nested cell arrays in a table
Hi, How does one reshape nested cell arrays in Matlab ? Let's say I have something like this: t = table({1:24}, {1:48}, {1:48}...

más de 1 año ago | 2 answers | 0

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How to convert cell to cell array of character vectors.
Thank you all for your input.

más de 1 año ago | 0

Question

How to subset a table with character elements
Hi, I have a very basic question I would like to understand. Lets say we have a basic table like so: year = {1994, 1994, 1994,...

casi 2 años ago | 2 answers | 2

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Question

How to obtain the unique combinations of two columns in a table
Hi, I am trying to obtain all the unique combinations of two columns in a table. Lets say we have the following table: year = ...

casi 2 años ago | 1 answer | 0

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Question

How to decompose and expand a vector into ones
Hi, How would you decompose and expand a vector in Matlab ? I might not be using the right terminology but let's I = [2, 2]' ...

casi 2 años ago | 2 answers | 0

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How to count the number of unique elements by group in a table

casi 2 años ago | 0

| accepted

Question

How to count the number of unique elements by group in a table
Hi, How can I count the number of unique elements by group in a table and save the answer in a vector ? % Create table name =...

casi 2 años ago | 2 answers | 0

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Question

How to change the dimensions of a structure
Hi, I have a structure that looks like this: % Create table Name = {'A', 'A', 'A', 'B', 'B', 'B', 'C', 'C', 'C'}.'; Month = ...

casi 2 años ago | 1 answer | 0

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Question

How to use Alternative Box Plot
Hi, I dont have the Statistics and Machine Learning Toolbox and I was wondering if anyone knew how to use the alternative box p...

casi 2 años ago | 1 answer | 0

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Question

How to make a cell array of cell arrays
Hi, How does one make a cell array of cell array in Matlab ? Let's A = (1:70), how can I transform this into a 14x1 cell array ...

casi 2 años ago | 3 answers | 0

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Question

How to convert cell to cell array of character vectors.
Hi, So I have a basic table that looks like this but has over 60 000 rows: A = [48.44, 48.16].'; B = ['A', 'B'].'; C = table...

casi 2 años ago | 2 answers | 0

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Question

How to extract a structure from a nested structure
Hello, I have a nested structure that look like this: % Create table Name = {'A', 'A', 'A', 'B', 'B', 'B', 'C', 'C', 'C'}.'; ...

casi 2 años ago | 1 answer | 0

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Question

How to assign points to multiple polygons using inpolygon
Hi, I am having some difficulties assigning points to multiple polygons. Lets say I have a table with the polygons information:...

casi 2 años ago | 2 answers | 0

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Question

How to declare variables in a function
Hi, I am curious as to why the variables 'user' and 'pass' are not recognized by Matlab in the following snippet. When the user...

casi 2 años ago | 1 answer | 0