Community Profile # ANKUR KUMAR

### NASA IMPACT

Last seen: 3 dagen ago Active since 2017

Researching with NASA IMPACT |
MATLAB for fun | Python for research |

https://www.nsstc.uah.edu/users/ankur.kumar/

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How to store matrices in a cell from a loop?
I am taking random data to show how you can store the output in a cell array using loop. for index=1:16 output{index}=rand...

10 dagen ago | 0

Deforming an image without changing axis scale
You can use axis square to force image to be square. See this below example. Let us load sample image: corn_gray = imread('cor...

10 dagen ago | 0

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Subplot with geobasemap and boxplot
You can do it easily using subplot. subplot(1,2,1) boxplot(randi(100,1,500)); subplot(1,2,2) tsunamis = readtable('tsunam...

11 dagen ago | 0

Data extraction from stacked plot

11 dagen ago | 0

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Access data from a cell array
Let us create a random data. random_data_cell=arrayfun(@(x) rand(138,18), 1:10, 'uni',0); Let merge these data set in a matrix...

11 dagen ago | 0

How to subtract symbol associated matrix columnwise
You cannot simply substract these two matrices, becasue B contains integers (double), and A has strings. You need to convert B ...

12 dagen ago | 0

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How to use the function uigetfile?
"How can I select the file from any folder on my computer?" This is pretty simple. You need to provide the full path of the fil...

12 dagen ago | 0

Removing data that exceeds y limit in a plot
x=linspace(0,3*pi,200); y=cos(x); plot(x,y) You can set range while calling the plot function. This is just an example. I am ...

12 dagen ago | 0

How to change the colour of the markers on a scattered graph?
I don't think I understood your question completely. Please do attach sample data (probably in a .mat file) and your complete co...

12 dagen ago | 0

Loop for renamed files from a folder
You can find the unique prefixes in the filename, and then use it to generate the string of numbers to rename the file. Here is ...

12 dagen ago | 0

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How to display an image in 3D cordinate axes ?
It is not really a 3D image. The third dimension has the RGB values. That is why you can able to see the color image. Let's see...

12 dagen ago | 0

Extract Digital Numbers from Image
You can simply use ocr command to do that. Refer to this documentation for some example, which would be a good starting point fo...

12 dagen ago | 0

How to create a netcdf in matlab which can be read by grads without using descriptor file?
There are often times when MATLAB created NetCDF files are not readable in earth and atmospheric science visualization softwares...

13 dagen ago | 0

Submitted

nccreatewrite
Creates the NetCDF file directly, and these NetCDF files are readbale in GrADS. Get rid of writing the long commands everytime t... How do I find the zero crossings for a function sinx/x against x?
Do you mean to find the x values which cooresponds to the zero in the y values? I do not think you have zero value in y variabl...

14 dagen ago | 0

How to calculate mean and standard deviation for loops?
You don't need to use loop for that. You can use cat command to concatenate, and then use mean and std functions to the matrix i...

14 dagen ago | 0

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How can I do this iteration?
Here is the sample code using random data a=rand(1,50); b=rand(1,50); threshold=0.5; % You need to change it to 1e-6 and use ...

14 dagen ago | 0

How to create a geographic colormap of the world using lat lon data?
You can simply use the contour or contourf or imagesc function to do that. Let us start with the random data. temp=randi(5,50,...

14 dagen ago | 1

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How can I produce equation from data set and optimize the equation
In order to produce equations for the datasets,, you can use fitnlm fucntion to do that. You will get an equation from that. Si...

14 dagen ago | 0

2D scatter-plot with colorbar
You can represent the no of measurements in bin as the fourth argument while calling the scatter plot. Here is the sample plot u...

14 dagen ago | 0

How to display subplot with multiple image with its own x and y axes ?
You need to make xaxis visible in every subplots. Here are the lines which you need to modify. title("Foreground before and aft...

14 dagen ago | 1

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How to find the point of highest concentration (plot)
There are multiple methods to select the center of the oval where density is maximum. One of the methods is just by counting the...

14 dagen ago | 0

How can I code a two variable function?
You can simply use for loop to iterate x and y. Refer to the below code just for your reference. You might need to make modifica...

14 dagen ago | 0

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Plotting multiple box plots on same graph with same size vector?
As you have not provided the exact data, I am generating just the random data. col=@(x)reshape(x,numel(x),1); boxplot2=@(C,var...

3 maanden ago | 0

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how can i select random 2*2 matrice of random number?
A=rand(randi(10,1,1),randi(10,1,1))

4 maanden ago | 0

error using sum what can I change to fix it
mean(displacement(isnumeric(displacement)))

4 maanden ago | 0

How would I find the Eigen values and plot the Eigen vector onto my scatter plot
In order to find the eigen values, you need to have a matrix. You can plot eigen values of two matrix on a scatter plot. A=rand...

4 maanden ago | 0

How can I read in comma separated data from csv where some cells contain multiple numeric values that are also comma separated?
"there are 6 cells containing data in MouseX, and each contains 7 comma separated values. So I'd want a 6 x 7 numeric array.": T...

4 maanden ago | 0

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