Community Profile

photo

roudan


26 total contributions since 2017

roudan's Badges

  • First Review
  • Thankful Level 2

View details...

Contributions in
View by

Question


How to keep information private?
when I googled my names, all my activities( like asking questions, my profile) in Mathworks show up. I am wondering if I can kee...

1 month ago | 1 answer | 0

1

answer

Question


how to expand 2D array?
Hi I create an array with shape of (2, 4), now I'd like to expand the array by 2 times in rows and 2 times in columns so the sh...

3 months ago | 1 answer | 0

1

answer

Question


use xlread to read csv file with mixed type data is very slow
Hi I have a csv file with mixed data type like below, first column is string, 2nd column is numerical, 3rd column tothe end c...

10 months ago | 1 answer | 0

1

answer

Question


Is there a PDF for all Matlab Functions?
Hi There is online version of list of all functions. https://www.mathworks.com/help/matlab/referencelist.html?type=function&li...

1 year ago | 1 answer | 0

1

answer

Question


plot distribution without interpolated contour
Hi Could you please help me with one question which has been with me for a long time? The below left figure show contour plot ...

1 year ago | 0 answers | 0

0

answers

Question


interpolation with non-zero data only when using griddata
Hi Happy New Year! Could anyone here help me with below issue? I am trying to show the contour of Well Injection Pressure ...

1 year ago | 1 answer | 0

1

answer

Question


how to control movie play rate?
Hi I am using videowriter and writevideo to generate a movie. The movie generated play too fast so I cannot see it. I am won...

3 years ago | 0 answers | 0

0

answers

Question


Can I use subvolume for 2d dateset?
I have a 2d dataset with northing easting coordinates. I like to extract a sub area with 4 corner points defined. Can I use subv...

3 years ago | 0 answers | 0

0

answers

Answered
how to redraw contourf after changing scale
thank you Walter

3 years ago | 0

Question


how to redraw contourf after changing scale
I used contourf. after changing the scales like colorbar min/max/interval, contour line interval etc, how to redraw the contour ...

3 years ago | 2 answers | 0

2

answers

Answered
Python-like generator for reading large CSV file?
Thank you, Guillaume. That is awesome! I appreciate it.

3 years ago | 0

Question


single precision data for griddata()
Hi when I use griddata(x,y,v, xq,yq), x,y,v,xq,yq are all single-precision data to save the memory. but there is an error say...

3 years ago | 3 answers | 0

3

answers

Question


Python-like generator for reading large CSV file?
I have a large csv file, typically I just read everything into a array like this num =csvread(filename,2,2) if csv file is...

3 years ago | 2 answers | 0

2

answers

Question


how to plot this time contour?
<</matlabcentral/answers/uploaded_files/108409/10.JPG>> Hi I saw someone plot this time countour. I don't know how to plot...

3 years ago | 0 answers | 0

0

answers

Question


Out of Memory for using many global variables
Hi I have many functions. so instead of use the variables as function arguments to transfer values between functions. I set m...

3 years ago | 0 answers | 0

0

answers

Answered
how to read big excel file faster?
Thanks Walter and Bob, are you guys talking about the same thing like using actxserver('Excel.Application') when Walter was sayi...

3 years ago | 0

| accepted

Answered
How to display trendline equation on the plot?
ok, I got it now. here are my codes, fittedlinecrossplot=polyfit(xdata_crossplot,ydata_crossplot,trendlinepolynomialcoeff)...

3 years ago | 1

| accepted

Question


how to read big excel file faster?
Hi I have a big excel file like 200MB and I am using xlread(). It is easier to use xlread(). But as the number of variables i...

3 years ago | 2 answers | 0

2

answers

Answered
pole plotting on stereonet
ThanksSarah. I appreciate it.

3 years ago | 0

Question


How to display trendline equation on the plot?
Hi I got the trendline using polyfit() and polyval(). and use plot() to the plot the trendline. Now my question is how to ...

3 years ago | 1 answer | 0

1

answer

Question


how to plot the lower or upper boundary lines for scatter data?
Hi I have a scatter plot. I'd like to plot the lines connecting the points either the upper or lower bound. How to do it? ...

3 years ago | 1 answer | 0

1

answer

Question


how to control xticklabel location?
Hi I change y limit, then my xticklabel location is aligned with previous y limits. For example, in the attached figure, o...

3 years ago | 0 answers | 0

0

answers

Question


How to format x date axis?
Hi I did try to find a answer online but I didn't get a good one so I am asking here for clearer help. In my plot (z vs. d...

3 years ago | 1 answer | 0

1

answer

Question


pole plotting on stereonet
Hi Anyone has codes for plotting stereonet? especially plot pole projection on lower hemisphere only. Thanks

3 years ago | 2 answers | 0

2

answers

Question


How to find position of a time vector in another time vector?
Hi I have two time vectors, one has random time spacing like A=[' 01/01/2001', '05/01/2001, ....], the other time vector has ...

3 years ago | 1 answer | 0

1

answer

Question


what is the equivalent function in 2014b for resample()?
Hi resample() function is not available in version 2014b. could anyone point me some equivalent functions? Basically, what I ...

3 years ago | 1 answer | 0

1

answer