Pregunta

find the lowest value in a selection of data
I have a matrix of data where I am working with columns 5 and 6. I have divided the data into sections based on the values of co...

alrededor de 3 años hace | 1 respuesta | 0

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Pregunta

sum only consecutive 1's in matrix
I have a matrix of data where I want to go down each column in the matrix, and sum the occurences where 1's occur consectively. ...

alrededor de 3 años hace | 2 respuestas | 0

2

respuestas

Pregunta

identifying if a number stays the same between files
I have 3 .csv files. I want to know if the numbers in column 5 of the first file stay the same or change between the next 2 file...

alrededor de 3 años hace | 1 respuesta | 0

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Pregunta

finding numbers below a threshold and doing calculations on them
I have a model of a box filled with particles. I have the velocity and coordinates of each particle in the box. I have divided t...

alrededor de 3 años hace | 1 respuesta | 0

1

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Pregunta

calculating angle between line of best fit and x axis
I have a set of coordinate points from a picture. I have used polyfit to find the line of best fit of these, but I want to find ...

alrededor de 3 años hace | 2 respuestas | 0

2

respuestas

Pregunta

using imagesc to plot a matrix of data
I am trying to see how temperature varies with different input parameters. I have 2 input parameters which vary between 0.1-0....

alrededor de 3 años hace | 1 respuesta | 0

1

respuesta

Pregunta

reshaping multiple data sets
I have a 50x4 double. I want to reshape each column of the matrix by taking the mean of every 10 elements. I have tried writin...

alrededor de 3 años hace | 1 respuesta | 0

1

respuesta

Pregunta

looping through columns of a matrix and saving output
I have a matrix which is 1000x4. Each column is a different experiment run. I want to loop through each column of the matrix a...

alrededor de 3 años hace | 1 respuesta | 0

1

respuesta

Pregunta

Array indices must be positive integers or logical values.
I keep getting issues saying 'Array indices must be positive integers or logical values', regarding the line ' c(1:(length(c)+...

alrededor de 3 años hace | 2 respuestas | 0

2

respuestas

Pregunta

using cumsum for a vector
I have a variable GT2, which is a 1x900 double. I am trying to do a cumulative sum, where for each cell it does a cumulative su...

más de 3 años hace | 1 respuesta | 0

1

respuesta

Pregunta

converting an excel formula into matlab
I've written the formulas out that I require in excel, but now I want to put these into matlab. The current matlab code I have...

más de 3 años hace | 2 respuestas | 0

2

respuestas

Pregunta

Accessing elements in a structure
I have 2 matlab files, both containing 2 elements: velocity and points. i have loaded these two files into a structure, but now...

más de 3 años hace | 1 respuesta | 0

1

respuesta

Pregunta

indexing a loop to run through multiple files
I have experimental data in multiple csv files. Ive written the code I want and checked this works by only inputting 1 specifi...

más de 3 años hace | 1 respuesta | 0

1

respuesta

Pregunta

memory errors with large amounts of csv files
I am running a model which produces thousands of csv files which i need to read into matlab. This particular run generated 27,17...

casi 4 años hace | 1 respuesta | 0

1

respuesta

Pregunta

using the title of excel spreadhseets to name graphs
I have 39 excel spreadsheets which I have inputted into matlab and created a subplot of grpahs from. I would like to name the r...

casi 4 años hace | 1 respuesta | 0

1

respuesta

Pregunta

using natsortfiles to import csv files correctly
I have been looking for a way to import many csv files into matlab in the correct order (e.g. csv1, csv2, csv3). My csv files h...

casi 4 años hace | 1 respuesta | 0

1

respuesta

Pregunta

find and save the rows where condition is met
I have a 1x3001 cell, 'y', and I want matlab to loop through all the cells and save all the rows where the value in column 2 is ...

casi 4 años hace | 1 respuesta | 0

1

respuesta

Pregunta

loop to identify new particles
I have the particle Id and y coordinates for every particle in my model over 3000s. My loop currently tells me how many grains...

casi 4 años hace | 1 respuesta | 0

1

respuesta

Pregunta

if number is already recorded don't record
My code reads data from multiple csv files, and identifies how many balls move past a certain y coordinate in each time step and...

casi 4 años hace | 1 respuesta | 0

1

respuesta

Pregunta

sum contents of array in groups of 10
My code produces a variable 'grains' which is a 1x3001 double. I want to sum together the numbers in the first 10 cells, and re...

casi 4 años hace | 1 respuesta | 0

1

respuesta

Pregunta

Operands to the || and && operators must be convertible to logical scalar values.
I am trying to run a series of data thorugh a if loop, to sum the amount of numbers between -0.13 and -0.16 found in each. When...

casi 4 años hace | 1 respuesta | 0

1

respuesta

Pregunta

display value if it lies between x and y
I have a series of csv files, which I want to input into a for loop, which tells me if any of the numbers in column 5 of the csv...

casi 4 años hace | 1 respuesta | 0

1

respuesta

Pregunta

changing the name of multiple csv files in a folder
I have a folder containing 3000 csv files. All of these are named in the format: cor0.1 sc10 fc0.1_0.csv. I want to change the ...

casi 4 años hace | 2 respuestas | 0

2

respuestas

Pregunta

plot graph from cell array
I have loaded 15 excel files into matlab and saved them all as a 15x1 cell. My aim is to create 15 graphs, showing the contents...

casi 4 años hace | 1 respuesta | 0

1

respuesta

Pregunta

saving the data in a variable
I have a code which imports a set of csv files from an experiment, and processes this to find out how many particles leave a sys...

casi 4 años hace | 1 respuesta | 0

1

respuesta

Pregunta

using grabit with log scales
I have used 'grabit' from the matlab file exchange, to extract the data from a published graph to compare with my own data. The...

casi 4 años hace | 1 respuesta | 0

1

respuesta

Pregunta

length of a signal when doing fft and power spectrum analysis
I am undertaking experiments on a sandpile to understand self organised criticality and therefore want to plot a power spectrum ...

casi 4 años hace | 0 respuestas | 0

0

respuestas

Pregunta

for loop to go through a cell array
I have written a code which tells me how many particles go past a certain x-coordinate for a single time step. The code accesses...

alrededor de 4 años hace | 1 respuesta | 0

1

respuesta

Pregunta

displaying the total number of times an if statement is true
I have a for loop with an if/else loop nested inside this: xc = particledata{1}(:,5); xc_array = table2array(xc); for b = 1...

alrededor de 4 años hace | 1 respuesta | 0

1

respuesta

Pregunta

for loop through a cell array
I have a 2001x1 cell array containing the data from 2001 .csv files. Each cell in the array contains the data for 1 time step of...

alrededor de 4 años hace | 1 respuesta | 0

1

respuesta