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Ahmed Abdulla


Last seen: Today Active since 2019

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Drag bar input form
Hi everyone, I havent seen this before and dont know if its possible. I have an image in 2d array format where the values in t...

3 months ago | 1 answer | 0

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Question


Delete files with a specific string
In my directory I have 1000's of files, however some files are not needed and they all have the string "Yes_" in their file name...

4 months ago | 1 answer | 0

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Divide array into 3 parts
I have a matrix of size (N,3), where I want to divide this matrix into 3 matrices where matrix 1 is 70% of N, matrix 2 is 15% of...

4 months ago | 1 answer | 0

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Question


Setting Neural network training dataset
I am aware that we can use the lines of code bellow to set the percentages of the dataset to be used for training, testing and v...

4 months ago | 1 answer | 0

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Colour changes from figure to png upon export
Hi everyone, I am generating a plot using the code below where the lines plotted in the loops are in white and with a width of 0...

4 months ago | 1 answer | 0

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Question


Change the range of an array
i have a 50x50 matrix with a maximum value of 1000 and a minimum of 200. I am looking for a way to increase the minimum to 350 a...

5 months ago | 3 answers | 0

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answers

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oversampling an array randomly
I have an array that contains 300 observations, and i would like to oversample this array to 472 observation. but i would this t...

9 months ago | 1 answer | 0

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set training to validation ratio
I have been using fitrensemble (gradient boosting - LSBoost) to find a model that fits my dataset, however I was wondering if an...

9 months ago | 1 answer | 0

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Question


Machine learning gradient boosting
I am new to the concept of gradient boosting, I would appreciate any links that can lead me to MATLAB implentations/examples/fun...

9 months ago | 1 answer | 0

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Finding the vertical offset of a gaussian fit
I apologize for posting this question again, as I believe I miss presented my question earlier. I have the following data poi...

10 months ago | 1 answer | 0

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Question


Obtaining the Gaussian equation for a distribution
I have attached a picture where i have the points in red (array of x and y values) and I would like to fit those points using a ...

10 months ago | 1 answer | 0

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Question


Command to import column vectors
I am importing .csv files into matlab and usually I just specify the output type to column vectors(as shown in the picture), I w...

11 months ago | 1 answer | 0

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Question


Evaluate integral at specific value
I have the following mathematical function f=5sin(x), I use the int(f) to obtain the integral of my expression. Is there a way f...

11 months ago | 1 answer | 0

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non continuous double integration
I am looking to integrate the following function 5sin(x) dx dy, however I am only aware of performing integrals for specific upp...

12 months ago | 1 answer | 0

1

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Question


Accessing .cdf files
I have downloaded some space science data from the following link,however, the file format is .cdf and I have no experience with...

12 months ago | 1 answer | 0

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Out of memory problem
Im running a code that deals with large datasets and i've made it as efficient as i possibly can by deleting any variables that ...

2 years ago | 1 answer | 0

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Obtaining the standard normal z score
Is there an easy way to obtain the standard normal z score with an upper tail probability of 0.05/2 or any number at hand

2 years ago | 1 answer | 0

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Question


Acquiring blocks of data
I have a 100x100 matrix (Matrix A) and ive been trying to get a matrix B. Where each cell in matrix B contains an array of all t...

2 years ago | 1 answer | 0

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Returning values from Blockproc
I used the following code to calculate the mean of blocks of data(compress down my matrix), but i was wondering if there is a wa...

2 years ago | 1 answer | 0

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Question


Setting color to text from a colormap
I have generated the following figure, the numbers are the correlatios from the scatter plot, i was thinking of changing the col...

2 years ago | 1 answer | 0

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Question


Suggestions on how to generate a mask
I have a matrix that is 1440x2880 of remote sensed temperatures from satallites, i was wondering if there is any way that i can ...

2 years ago | 1 answer | 0

1

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Question


Grabbing points from scatter plot
I have 2 matrices and i plotted them on a scatter plot and i would like to highlight some points from the plot and discard all t...

2 years ago | 1 answer | 0

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Question


Evaluating the probability as a one tailed students t distribution
I have a value “tj” and I would like to evaluate the probability of this value using the students t distribution. I also have ...

2 years ago | 1 answer | 0

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Question


Calling a string from string array
I have an array 1 by 11 which has 11 strings but i wanted to know how can i name the title of one of my plots as the 3rd string ...

2 years ago | 1 answer | 0

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Obtaining the t-P value of the partial correlations
sorry if this sounds stupid, the following picture is from a paper i am reading, i have obtained a matrix of r (the partial corr...

2 years ago | 0 answers | 0

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Obtaining the P values for the t stat
I have both the tstat and the degrees of freedom, is there a quick way to find the P value of a two tailed hypothesis at a signi...

2 years ago | 1 answer | 0

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Answered
Obtaining Heteroscedastic regression coefficients and their properties
i managed to figure it out SE = diag(sqrt(E)) where E is the variance-covariance matrix

2 years ago | 0

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Question


Obtaining Heteroscedastic regression coefficients and their properties
the picture attaches shows the normal regression line results using the fitlm :estimates of the regression coefficients, the Sta...

2 years ago | 1 answer | 0

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Question


Is it possible to access the lines of code from a pre built command
I wanted to ask if it was possible to see what lines of code run when a pre built function or command gets run in matlab.

2 years ago | 1 answer | 0

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Question


Converting .tif file into an .ascii file
I have a .tif file that i would like to convert to .ascii . Or a way to be able to convert the .tif file into a numerical matrix...

2 years ago | 0 answers | 0

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