# Ahmed Abdulla

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Question

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...

3 months ago | 1 answer | 0

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answerQuestion

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...

3 months ago | 1 answer | 0

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answerQuestion

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...

4 months ago | 1 answer | 0

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answerQuestion

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...

4 months ago | 1 answer | 0

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answerQuestion

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 ...

4 months ago | 1 answer | 0

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answerQuestion

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...

6 months ago | 1 answer | 0

### 1

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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...

6 months ago | 1 answer | 0

### 1

answerQuestion

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...

6 months ago | 1 answer | 0

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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...

6 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 ...

1 year ago | 1 answer | 0

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answerQuestion

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

1 year ago | 1 answer | 0

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answerQuestion

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...

1 year ago | 1 answer | 0

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answerQuestion

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...

1 year ago | 1 answer | 0

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answerQuestion

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...

1 year ago | 1 answer | 0

### 1

answerQuestion

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 ...

1 year ago | 1 answer | 0

### 1

answerQuestion

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...

1 year ago | 1 answer | 0

### 1

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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 ...

1 year ago | 1 answer | 0

### 1

answerQuestion

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 ...

1 year ago | 1 answer | 0

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answerQuestion

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...

1 year ago | 0 answers | 0

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answersQuestion

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...

1 year ago | 1 answer | 0

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answerObtaining Heteroscedastic regression coefficients and their properties

i managed to figure it out SE = diag(sqrt(E)) where E is the variance-covariance matrix

1 year 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...

1 year ago | 1 answer | 0

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answerQuestion

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.

1 year ago | 1 answer | 0

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answerQuestion

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...

1 year ago | 0 answers | 0

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answersQuestion

a figure with only a numeric value

I want to find the correlation between two data sets and just have a figure without any points or anything it just displays the ...

1 year ago | 1 answer | 0

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answerQuestion

A subplot with a numerical value

Ive seen the following figure and i wanted to ask if it was possible to have a subplot with only a value like half of the figure...

1 year ago | 1 answer | 0

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answerQuestion

Different coloured markers based on values

I have values to be plotted that range from 0 to 0.1 and i would like the markers of the values less than 0.05 be box markers fi...

1 year ago | 2 answers | 0

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answersQuestion

Dealing with NaN values when compressing matrix

I have 1000 by 1000 matrix and i want to convert it into a 10x10 matrix, ive found several way on the community that does this. ...

1 year ago | 1 answer | 0

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answerQuestion

Referring to specific input in loop

I am writing a function and the input arguments are Data1 Data2 Data3 Data4 .... DataN. I am running a loop from i=1:N and one o...

1 year ago | 1 answer | 0

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answerQuestion

A Varying matrix name in loop

I have a loop running from i=1 to N where N is unkown and inputted by the user and the commands in the loop generates a matrix a...

1 year ago | 2 answers | 0