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# Ahmed Abdulla

Last seen: 1 year ago Active since 2019

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Question

Interpolate points between two coordinates
I have the coordinates of points A and B, and I would like to obtain the coordinates of N number of points between A ans B if co...

1 year ago | 1 answer | 0

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Question

Use line design parameters to obtain coordinates
hi everyone, I would like to obtain the coordinate points that would produce the line in black in my image, given that I have R,...

1 year ago | 1 answer | 0

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Use workspace variable in equation solver
I have the equation x+y=25 and currently I have y as a predfined variable=5. so the equation becomes x+5=25. However I would lik...

1 year ago | 2 answers | 0

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Identify wing aileron deflection
I am using AID toolbox on matlab, i want to define two wings with two sets of ailerons. By default i can add deflection to t...

2 years ago | 1 answer | 0

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parallel pool to increase code speed
I have a very long code that uses a lot of functions which I have written, currently the code takes around 3 minutes to run. I h...

2 years ago | 1 answer | 0

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Dot Product of Rows in array
I have two arrays, A of size 1000x2 and B of size 1000x2. I would like to get dot product of the each set of rows so that the re...

2 years ago | 1 answer | 0

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Boundary detection using Machine/Deep learning
I have the following x and y points that make a shape, however the points are not in order and when using a line plot all the li...

2 years ago | 0 answers | 0

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Find identical rows in matrices
I have matrix A (1000x3) and matrix B (1200x3), is there an easy way to know what rows of matrix A already exist in Matrix B. An...

2 years ago | 1 answer | 0

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Order Points for plotting
I have the coordinates of the above two shapes imported from a CAD software, however when I plot the shape the points are not in...

2 years ago | 1 answer | 0

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Question

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...

2 years 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...

2 years ago | 1 answer | 0

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Question

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...

2 years 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...

2 years ago | 1 answer | 0

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Question

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...

2 years 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...

2 years ago | 3 answers | 0

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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...

2 years 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...

2 years ago | 1 answer | 0

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Question

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

2 years ago | 1 answer | 0

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Question

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...

2 years 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 ...

2 years 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...

3 years 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...

3 years ago | 1 answer | 0

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Question

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...

3 years ago | 1 answer | 0

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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...

3 years ago | 1 answer | 0

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Question

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 ...

3 years ago | 1 answer | 0

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Question

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

3 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...

4 years ago | 1 answer | 0

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Question

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...

4 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...

4 years ago | 1 answer | 0