Question

extend the mesh from 2D line to 3D plane
Hi: I have a set of 2D scatter plot, such as [linspace(1,10,100),linspace(1,10,100)]. now I want to extend it into 3D plan...

nästan 7 år ago | 0 answers | 0

Question

numerical gradient with extra-large data size
Hi: I have a 3D coordinate with significantly large size: 1e9*3. and I have value of parameter at each of these points suc...

nästan 7 år ago | 1 answer | 1

Question

undisired grid size with meshgrid
Hi: I have a three 1-D constant space matrix, and I want to use them to generate a 3D space mesh. the size of each is x: 1*5...

nästan 7 år ago | 2 answers | 0

Question

textscan problem (seperate data and sring)
hi: I have a large file, the first two lines are strings, and the third to end (such as 10000th line) are data. I use textsc...

ungefär 7 år ago | 1 answer | 0

Question

how to plot contour with 3 dimensional data
hi: I have a 3-dimensional data x-y-z. the x,y value is the coordinate in x-y axis, the z value is a parameter dis...

mer än 7 år ago | 1 answer | 0

Question

how to do matrix interpolation faster
hi: I met a problem when trying to do interpolation with a matrix. I have base coordinate x,y,z,with size 10000*3, b...

mer än 7 år ago | 1 answer | 0

Question

problem when write first line to text file
hi: I met some problem when tried to write the first line to text file. below is what the base test file was. <<...

mer än 7 år ago | 1 answer | 0

Question

fprintf to txt too slow, anyway to accelerate it?
hi: I have data with different column, such as a=ones(100,2), b=ones(50,2); but I want to append them and export to a ...

mer än 7 år ago | 1 answer | 0

Question

how to save multiple figure without displaying
I'm working on a code that repeating plot data to different figure. below is a test code: clear clc for j=1:3 ...

mer än 7 år ago | 4 answers | 0

Question

excelwrite too slow problem
hi: in my code, I need to: 1. read huge amount of data. 2. find the data I need. 3. export to the excel. ...

mer än 7 år ago | 0 answers | 0

Question

any faster way to load part of the mat file?
hi: I have a large matfile ROP, with the size of 45*156*300000, but I only need part of the data with given i: ROP(i,:,:). ...

nästan 8 år ago | 1 answer | 0

Question

is there anyway to optimize the code for parfor?
I have loop runs good, but I want to optimize it for parfor. however when I change the first 'for' into 'parfor', it appears: ...

nästan 8 år ago | 2 answers | 0

Question

dlmread result different from load
I met a question about dlmread. the .dat file I have, opened with notepad is like below: <</matlabcentral/answers/uploaded_f...

ungefär 8 år ago | 1 answer | 0