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Madan Kumar


Last seen: 5 months ago |  Active since 2017

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Contour plot with polar stereoghapic projection in north hemispehere above 60 degree latitude
Hi, I have ut(24), lat(24) and z (24x24); data attached as .mat. I want to plot a contour plot in polar stereographic projectio...

1 year ago | 1 answer | 0

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answer

Question


How to read *.hc file in matlab? or convert *.hc file into *.nc file?
Hi, I need to read data from *.hc file in matlab. However, I donot know any steps to open. I tried to open using open but it on...

1 year ago | 0 answers | 0

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answers

Question


write data into a file line by line inside foef(fid) loop
Hi, I need to read data from .txt file line by line and then for each line I have to call a function (function takes single val...

2 years ago | 1 answer | 0

1

answer

Question


Map projection doesn't work in Matlab2015a?
Hi, I have lat (37x73), lon(37x73) and a rainfall data(37x73). I plotted the rainfall data (attached) on map with robinson proj...

2 years ago | 0 answers | 0

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answers

Question


Binning data into 1 hour average in cell array?
Hi, I have large number of .txt files; each file corresponds to day of year. Data in each file is like say (1348x4, not same al...

2 years ago | 1 answer | 0

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answer

Question


How to plot time with correlation of two matrix?
Hi, I have two matrices (each of 1000*50), here let's say A and B. The time resolution of both the martices are same (correspon...

2 years ago | 1 answer | 0

1

answer

Question


convert epoch time(timestamps) into 30 minutes average bin?
Hi, I have a data file (of dimension 2195x56) for one day with 30 seconds interval (some data are missing). first column is the...

3 years ago | 0 answers | 0

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answers

Question


Automatic AR1 estimation failed. Specify it manually (use arcov or arburg).
Hi, I am using matlab2015b for calculating "Cross-wavelet and wavelet coherence" from https://in.mathworks.com/matlabcentral/fi...

3 years ago | 0 answers | 0

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answers

Question


Is gradient() similar to diff()?
Hi, I have altitude(z) profiles of temperature(T). I need to calculate dT/dz. I calculated gradient(T,h),h is step size. Again,...

4 years ago | 1 answer | 0

1

answer

Question


Highlight a specific contour level in contour plot?
Hi, I have a contour plot and I want to highlight only a selected contour level. How can I do it? I tried all techniques report...

4 years ago | 1 answer | 0

1

answer

Question


How to read values for the range between each maximum and each minimum from a large uneven data file?
Hi, I have a data file with 11000 rows and 4 columns. I need to read all values (in all columns) for data between each maximum ...

4 years ago | 1 answer | 0

1

answer

Question


How to do line plot with time sequence?
Hi, I have altitude, density and time data. How can I do line plotting with time sequence, i.e. time, altitude and density in x...

4 years ago | 1 answer | 0

1

answer

Question


How to normalize data to loop variable?
Hi, I have about 100 equations and I have to normalize sum of all to loop variable. For simpliciyt, let say I have 3 equations...

5 years ago | 0 answers | 0

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answers

Question


Convolution with Gaussian filter with fixed resolution for non-uniform data?
I have non unifrom data (x,y) (attached, simplified). I need to use gaussin filter of fixed window size with fixed resolution. F...

5 years ago | 0 answers | 0

0

answers

Question


calculate mean using while and iteration?
Hi, I have data of ~3500x2. I want to calulate mean of second column for a particular condition in first column using 'while'. ...

5 years ago | 2 answers | 0

2

answers

Question


How to do convolution of data using rectangular filters of fixed bandpass?
Hi, I have data (attached) which contains wave length and corresponding intensity. I need to do convolution using two rectangul...

5 years ago | 0 answers | 0

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answers

Question


outerline of plot with multiple peaks?
Hi, I have a plot with multiple peaks (here, 2 peaks for simplicity and data is also attached). I want to plot the outerilne ab...

5 years ago | 1 answer | 0

1

answer

Question


Index in position 1 exceeds array bounds (must not exceed 64) in digital image data.
It is part of a big code to work with digital image data from satellite observation. It shows error "Index in position 1 exceeds...

6 years ago | 1 answer | 0

1

answer

Question


error in netcdf file (vardata = ncObj.read(varName, varargin{:});) worked earlier.
Hi, I have written a code to read data from .nc file. Some days earlier it was fine. However, suddenly it is showing following ...

7 years ago | 0 answers | 0

0

answers

Question


Extracting elements from a matrix based on the maximum position in another matrix
Hi, I have matrices A(100x96) and B(100x96). My aim is to find the value of element in A corresponding to position of max in B....

7 years ago | 2 answers | 0

2

answers

Question


spline interpolation for repeated (non periodic) data?
Hi, I have a matrix (33175x12) with repeated (non-periodic) values (x below). I tried to interpolate but getting error "The d...

7 years ago | 1 answer | 0

1

answer

Question


Calculate mean of columns for a unique value of column variable?
I have a matrix of 38767*31. I want to calculate mean of columns for unique value of variable in columns (in first row).Let me c...

7 years ago | 3 answers | 0

3

answers

Question


plotting rainfall data, having latitude and longitude, on map
Hi, I have problem with plotting rainfall data (with latitude and longitude) on map. I googled it, there were many answers but ...

7 years ago | 1 answer | 0

1

answer

Question


In an assignment A(I) = B, the number of elements in B and I must be the same. while averaging row in Netcdf file
Hi, I want to average the value of CO2 for a fixed height in fixed region in Netcdf file. I wrote code for single file. It's ...

7 years ago | 1 answer | 0

1

answer