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Ahmed Abdulla

Last seen: 15 días ago
42 total contributions since 2019

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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 ...

2 meses ago | 1 answer | 0

1

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

2 meses ago | 1 answer | 0

1

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...

3 meses ago | 1 answer | 0

1

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...

3 meses ago | 1 answer | 0

1

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...

3 meses ago | 1 answer | 0

1

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 ...

3 meses ago | 1 answer | 0

1

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...

3 meses ago | 1 answer | 0

1

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 ...

3 meses ago | 1 answer | 0

1

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 ...

4 meses ago | 1 answer | 0

1

Question

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...

4 meses ago | 0 answers | 0

0

Question

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...

4 meses ago | 1 answer | 0

1

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

4 meses 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...

4 meses ago | 1 answer | 0

1

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.

4 meses ago | 1 answer | 0

1

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...

4 meses ago | 0 answers | 0

0

Question

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 ...

4 meses ago | 1 answer | 0

1

Question

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...

4 meses ago | 1 answer | 0

1

Question

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...

4 meses ago | 2 answers | 0

2

Question

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. ...

4 meses ago | 1 answer | 0

1

Question

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...

4 meses ago | 1 answer | 0

1

Question

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...

4 meses ago | 2 answers | 0

2

Question

Optional Function input arguments
I am writing a function and basically it does a set of command on the inputted matrices, How can i specify that the user can ent...

4 meses ago | 1 answer | 0

1

Question

Compress down a 1000x1000 matrix into a 100x100 matrix
I have a 1000x1000 matrix that contains various values. I would like to compress it down into a 100 by 100 matrix by averaging e...

4 meses ago | 2 answers | 0

2

Question

Finding the t values of the Student's t test (t1-α,ν)
I have both 1-α and i have v and i was wondering if there is a way to get the t-value directly in Matlab rather than reffering t...

4 meses ago | 2 answers | 0

2

Question

Obtaining the variance-covariance matrix
i wanted to ask if by doing the result will be equal to E as in the equation shown

4 meses ago | 1 answer | 0

1

Question

Obtaining the Uni-variate 95% confidence intervals
I have Matrix A [1000,1] of variable A readings at 1000 locations, I also have Matrix B [1000,1] of variable B readings at the s...

4 meses ago | 0 answers | 0

0

Question

Obtaining the Bonferroni 95% confidence interval between two variables
I have Matrix A [1000,1] of variable A readings at 1000 locations, I also have Matrix B [1000,1] of variable B readings at the s...

4 meses ago | 1 answer | 0

1

Question

Obtaining the Partial Correlation Coefficient
I have Matrix A [1000,1] of variable A readings at 1000 locations, I also have Matrix B [1000,1] of variable B readings at the s...

4 meses ago | 0 answers | 0

0

Question

Calculating the Regression Coefficient
I have two column matrices that contain data and i wanted to caculate the regression coefficient between the two matrices

4 meses ago | 1 answer | 0

1

Question

only accept odd numbered input arguments
I am writing a function and I would like it to only run if the input argument is odd, is there an easy to specifcy that the inpu...

4 meses ago | 1 answer | 0