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jie hu


Last seen: 3 months ago |  Active since 2019

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Question


create animation from several figures
how to create an animation from several figures?

3 months ago | 1 answer | 0

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answer

Question


csv reading related matter
I have created a .csv file with date and value by fid=fopen([file(1:4) '.csv'],'w'); fprintf(fid,'%s,%s,%s\n', 'Time...

4 months ago | 1 answer | 0

1

answer

Answered
how can I calculate the nautical direction angle from Cartesian x- and y-component of velocity
thanks, But I am talking about the direction in Nautical convention. for y1 = atan2d(10, 10) = 45, shall that angle be 225 in Na...

4 months ago | 0

Question


how can I calculate the nautical direction angle from Cartesian x- and y-component of velocity
I have a set of Cartesian x- (u) and y-component (v) of velocity. But I want the velocity to be Nautical direction based, which ...

4 months ago | 1 answer | 0

1

answer

Question


semilog plot with a self defined x-axis range
I have a time series data and I would like to plot them in the semilogx ranging from [10^(-4) to 10^2] as the attached figure. M...

5 months ago | 1 answer | 0

1

answer

Question


problem of using findpeaks
I have two vectors of time (datetime formate) and elevation, but there is an error to use findpeaks(elev,time), saying "Expected...

5 months ago | 2 answers | 0

2

answers

Question


The sample points must be finite.
I like to interpolate a sample data on a new timeline by useing interp1, saying "The sample points must be finite." data_origin...

10 months ago | 1 answer | 0

1

answer

Question


"griddata" results in much smaller values than original data
I am using "griddata" function to interpolate original data on query points. However, the interpolation value on the query point...

1 year ago | 2 answers | 0

2

answers

Question


formulation of square matrix
Hello everyone, I want to formulate a very big square matrix, in which every element is again a square matrix. I want the sqaur...

5 years ago | 1 answer | 0

1

answer

Question


How can I place a quiver plot to a specified z location
Hello everyone, I have a quiver 2d plot about velocity field. How can I place it to a specified location? Thanks for your help...

5 years ago | 1 answer | 0

1

answer