Community Profile # C.G.

Last seen: Today Active since 2020

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Question

if column 1 is nan, make corresponding number in column2 nan
I have the code below which randomly assigns 10% of the dataset to Nan. However this only turns column 1 to NaN. How can I make ...

4 Tage ago | 2 answers | 0

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Question

fit data trend with equation
I have the datset attached, and i'm trying to find an equation which describes the trend. I have tried using basic fitting but...

2 Monate ago | 0 answers | 0

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Question

changing time interval of interest in a dataset
My code below uses my data, and follows the equation Q_i+1 - Q_i/time The time interval of interest changes as defined by time....

3 Monate ago | 1 answer | 0

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Question

Changing numbers summed together in for loop
I have a code below, which minuses one value from another and divides it by the defined time interval (dt). This code works fo...

3 Monate ago | 1 answer | 0

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Question

looping through multiple numbers
I have written a script, which tells me which rows of A are above the threshold, and then the difference between the numbers in ...

4 Monate ago | 1 answer | 0

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Question

r squared comparing sine waves
I have a dataset to which I have asked matlab to fit a sine wave. I want to find the r^2 value to see how well the sine curve I ...

5 Monate ago | 0 answers | 0

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Question

fit a sine wave to a set of data points
I have the dataset attached and the code below to try and fit a wave to the data. Im getting the following error which I can't g...

5 Monate ago | 1 answer | 0

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Question

moving sum over multiple time windows
I have a dataset Q_opss, and I want to find the maximum moving sum of the dataset over lots of different windows. I have the co...

6 Monate ago | 1 answer | 0

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Question

logarithmic binning data in matlab
I have a dataset, and I have been told to bin the data using logarithmic binning. How would I go about logarithmic binning this...

7 Monate ago | 1 answer | 0

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Question

plotting a CDF with 2 logs axis
I have a time series of data, and I want to plot a CDF for this. I have plotted the cdf for this, but it is on normal axis. Is ...

7 Monate ago | 1 answer | 0

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Question

moving mean over 5 cells
I have a dataset where im trying to find the mean of every 5 cells and then divide this by 5 I have the code below, but I have ...

7 Monate ago | 1 answer | 0

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Question

error using etime (datevec)
I have a csv file with times for experiment start and end. I'm trying to use etime to work out the time difference but im gettin...

8 Monate ago | 2 answers | 0

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Question

error using textscan with csv files
I have been given a code to process some data in a csv file. When I run this I get the error below. Can anybody help? fid = fop...

8 Monate ago | 1 answer | 0

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Question

interpolating data to different sample rate
I have 2 data sets I want to correlate. One is sampled every second, and one is sampled at a much smaller interval (attached). I...

8 Monate ago | 2 answers | 0

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Question

resampling data into equal intervals
I have a dataset (attached) which has been sampled at unequal intervals, but for processing I need to resample this to every sec...

8 Monate ago | 1 answer | 0

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Question

saving figure with title as name of file
I have 4 .mat files. I extract the data from these, plot them and save each figure. Now, I want the title of the plot, and the ...

11 Monate ago | 1 answer | 0

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Question

looping through 2 .mat files
I have 2 matlab files with data in. Im trying to get my code to loop through both files and put the data into the 6 pre-assigned...

11 Monate ago | 1 answer | 0

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Question

making repetitive code less clunky
My code works, but its very long winded. I didnt know if there was a way this could be simplified to get the same outcome? I wa...

11 Monate ago | 2 answers | 0

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Question

plotting multiple vertical lines on a graph
Im currently using the code below to plot vertical lines on my graph at 0.5 intervals, but I want to change this to plot at ever...

11 Monate ago | 1 answer | 0

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Question

plotting a line of best fit using a for loop
I have the code to plot a line of best fit through my data but now I am trying to do this for multiple data sets in a for loop b...

12 Monate ago | 1 answer | 0

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Question

store multiple outputs into one matrix
My code currently produces 14 individual variables (x1-7 and y1-7), I am currently plotting these on a graph using hold on state...

12 Monate ago | 1 answer | 0

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Question

find maximum number in a range of data
I have a matrix T, and I have asked it to find all the rows where the value in column 5 is between 2 numbers and save these as S...

12 Monate ago | 1 answer | 0

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Question

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...

12 Monate ago | 1 answer | 0

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Question

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. ...

12 Monate ago | 2 answers | 0

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Question

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...

12 Monate ago | 1 answer | 0

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Question

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...

12 Monate ago | 1 answer | 0

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Question

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 ...

12 Monate ago | 2 answers | 0

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Question

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....

12 Monate ago | 1 answer | 0

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Question

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...

12 Monate ago | 1 answer | 0