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Reema Alhassan


Active since 2018

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Calculate the Sum of the nightlights data from TIFF images
A program that read the nightlights data from the satellite images (TIFF) and calculates the sum of lights inside each geometry ...

bijna 4 jaar ago | 1 download |

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Why this error occurs in gunzip?
Error using untar (line 60) Unexpected end of input stream when attempting to GUNZIP the fileError using untar (line 60) Unexp...

meer dan 4 jaar ago | 1 answer | 0

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Answered
To ignore the data files with error and proceed in the code
Do you know why this error occurs ?

meer dan 4 jaar ago | 0

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how to write a long field in a shape file?
hello, I need to write a long field in a shape file but I couldn't for example I want the field to be "Sum2015vcm_orm" but...

meer dan 4 jaar ago | 1 answer | 0

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Unzipping using system command ? I couldn't understand the command
someone wrote this and he said it was very helpful sys_cmd_unzip = @(z,d) ['"C:\Program Files\7-Zip\7z.exe" e -y -r -o"...

meer dan 4 jaar ago | 1 answer | 0

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how to write long field name in a shape file?
Hello everyone , I need to write new column in a shape file so I used setfield function SumOfLightColumn=strcat('S...

meer dan 4 jaar ago | 1 answer | 0

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faster unzipping for large URLs?
Hello everyone, I'm using gunzip(url,folder); untar(url,folder); to unzip satellite images which has the extensio...

meer dan 4 jaar ago | 0 answers | 0

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how to display number in decimal ?
Hello everyone, I have tried : format long format short value=double(value) and the output still fraction number ...

meer dan 4 jaar ago | 1 answer | 0

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How to save the values after each iteration in a matrix ?
Hello everybody , I did some calculation in a loop and this is the output I need to put the value after each iteration in N...

meer dan 4 jaar ago | 1 answer | 0

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is there a way to go to the line above using fprintf function ?
I'm writing on a csv file and I'm writing column by column for example here : for i = 1 : length(col) fprintf( fid, ...

meer dan 4 jaar ago | 1 answer | 0

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how to extract the fields header in the shape file?
Is there a way to extract the fields headers in the shape file ? 13×1 struct array with fields: I need to read the headers Ge...

meer dan 4 jaar ago | 1 answer | 0

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xticklabels function for more than 11 labels ?
Hello everyone , I need to use the function "xticklabels" for labeling the x-axis this is my code: figure (1) xti...

meer dan 4 jaar ago | 2 answers | 0

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about poly2mask function
Could anyone please explain me this : I'm using poly2mask function to creat a mask of a polygon with an image the documentation...

meer dan 4 jaar ago | 0 answers | 0

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how to specify the polygon edges ?
Hello every one , I want to ask what Is the polygon edge ? which is requires here in the inputs parameter? https://ww2.math...

meer dan 4 jaar ago | 0 answers | 0

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how to convert matrix size
I have a matrix s which has the size : 2882x2575 then I convert it to 7421150x1 by this: s1=s(:); and I did some pro...

meer dan 4 jaar ago | 1 answer | 0

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how to merge two matrix to one matrix ?
I have x and y coordinates I need to merge them into one matrix having the size: Mx2 x=[50.2124 50.2133 50.2134 50.2134 5...

meer dan 4 jaar ago | 1 answer | 0

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function faster than inpolygon()?
Is there a function faster than inpolygon()? or another way to do the intersection ? because it sometimes takes too much tim...

meer dan 4 jaar ago | 0 answers | 1

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how to deal with large polygons ?
hello everyone, I'm using geoimread() to read the image with the x and y coordinates of each polygon. and then I extract the x ...

meer dan 4 jaar ago | 1 answer | 0

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how to clip geotiff image ?
hello everyone I have a geotiff image and 4 coordinates xmin, xmax, ymin,ymax (the boundingBox of a shape file) I need to cl...

meer dan 4 jaar ago | 1 answer | 0

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how to convert the shape file to mask (binary)?
I need to convert the shape file to binary matrix with the size of the image that I have to multiply it with the values of the...

meer dan 4 jaar ago | 0 answers | 0

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why X and Y coordinates must have the same size ?
hello, I have an image and a shape and I need to clip the image based on the coordinates of the shape but when I do this I...

meer dan 4 jaar ago | 1 answer | 0

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how to clip an image based on x and y coordinates
hello everyone I have a satellite image and I need to clip the image based on the coordinates of x and y from a shape file I h...

meer dan 4 jaar ago | 0 answers | 0

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how to extract the information from shape file and write it in excel file
hello everyone I have a shape file which has 13 polygons and every polygon has 24 fields of information I need to extrac...

meer dan 4 jaar ago | 0 answers | 0

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how to make a variable execute only once ?
Hello I have a viable t I want it to be 0 only for once then I need to increment it by 1 each time when I do this t=0...

meer dan 4 jaar ago | 2 answers | 0

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convert number in a matrix to a scalar
Hello everyone I have matrix "values" and I need to sum all of it's element so I use sumOFvalues= sum(values(:)); the sumOF...

meer dan 4 jaar ago | 2 answers | 0

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how to make a consecutive matrix before and after the decimal point?
Hello everyone , I have two numbers a=38.656528472900447 and b=43.667495727539006 I want to make an array which start from a...

meer dan 4 jaar ago | 1 answer | 0

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Answered
Statistic summary of values of raster pixels inside polygons?
Hello Marmar, this is exactly what I need to do if you have a code of doing this could you share it please ? till know I can...

meer dan 4 jaar ago | 0

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How to extract polygons coordinates from shape file?
hello, I have a shape file which contains 10 polygons I need to extract the coordinates for each polygon how can I do that ?...

meer dan 4 jaar ago | 1 answer | 0

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clip Geotiff image by many polygons
Hello everyone, I have a geotiff image and a shape file which contains 13 polygons and I need to clip this image based on these...

meer dan 4 jaar ago | 1 answer | 0

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How can i perform zonalstat for irregular polygons ?
Hello there, Does anyone know how to perform zonalstat for irregular polygons in Matlab? Are there any functions to do that ...

meer dan 4 jaar ago | 0 answers | 0

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