# MJFcoNaN

**Programming Languages:**

Python, MATLAB, Shell, Fortran

**Spoken Languages:**

English, Mandarin

**Professional Interests:**

Earth, Ocean, and Atmospheric Sciences

**Statistics**

RANK**689**

of 271,741

REPUTATION**90**

CONTRIBUTIONS

**0** Questions

**50** Answers

ANSWER ACCEPTANCE **
0.00%
**

VOTES RECEIVED**7**

RANK**17,710** of 18,323

REPUTATION**0**

AVERAGE RATING**0.00**

CONTRIBUTIONS**1** File

DOWNLOADS **1**

ALL TIME DOWNLOADS**4**

RANK

of 120,286

CONTRIBUTIONS

**0** Problems

**0** Solutions

SCORE**0**

NUMBER OF BADGES**0**

CONTRIBUTIONS**0 Posts**

CONTRIBUTIONS**0** Public Channels

AVERAGE RATING

CONTRIBUTIONS**0** Highlights

AVERAGE NO. OF LIKES

**Content Feed**

Create variables inside the field of netcdf

Hello, "Europe" will be a group name in netcdf: GID = netcdf.defGrp(fid,'Europe'); lat_ID = netcdf.defVar(GID,'lat','doubl...

5 months ago | 0

| accepted

Error using im2frame

Hello, getframe is the suitable fucntion there: frame = getframe(gcf);

5 months ago | 1

| accepted

Deleting non identical values of 2 vectors?

Hello, The function of ismember may help you a = [5 6 1 8 4 7 3]; b = [4 5 6 2]; [lia,locb]=ismember(a,b); a(~lia)=NaN

5 months ago | 0

| accepted

How can I read variables （lat lon and chl-a）in nc files with groups？

Hello, If possible, I will suggest you choose the "level 3 mapped data" which is much more convenient to deal with in matlab, b...

5 months ago | 1

| accepted

How to fix the figure plot always being above on the screen?

Hello, You may set the figure property of WindowStyle to 'modal' : f=figure; f.WindowStyle='modal'; PS: 'docked' is another ...

5 months ago | 0

pyrunsfile doesn't work when python script includes "import"

Hello, As I know, there were some python packages that some versions of matlab can't load if you installed them in virtual envi...

5 months ago | 0

finding the index of NaN

You may use "isnan" A = [10 30 NaN 30] isnan(A) PS: There is a tip from help document "NaN values are not equal to each othe...

5 months ago | 1

Creating a Timetable from a large excel data set

Hello, What type is the AbsTime? Does this one work? t=table2timetable(m137);

5 months ago | 0

Connection error Matlab Download and Installation

Hello, It could not be a regular connection problem by firewall or proxy since you can download some parts. I will suggest you...

5 months ago | 0

Find the nearest point of intersections of circles

Hello, You may need a different method than intersection. For example create a distance function under your own criterion. This...

6 months ago | 0

| accepted

How to plot an ocean depth profile colormap for a angled coast?

Hello, The 2D or 3D interpolation may help. The method of reading lon and lat suggests your ROMS's grid in a form of "ndgrid",...

6 months ago | 0

Is there any other function faster than sum(A,2) to get the sum of all rows?

In general, the native functions are optimized sufficiently. In certain cases, there may be some better way but in other parts ...

6 months ago | 0

Error while finding peak value and location

Hello, You should sort the "x" variable ("vv" in your code) before calling findpeaks load 'vv.mat' load 'cc.mat' for m = 1:n...

6 months ago | 1

| accepted

How do you determine if a point is to the left or right of a curve?

Hello, Is "to the right" meaning that a red point is in the polygon of blue track? The function of inpolygon may help: [in, on...

6 months ago | 0

| accepted

Import part of dataset in a HDF5 file, by 'member' and/or 'logical array'

Hello, The "start, count, stride" is suitable for slicing a huge matix. For example this will only read a "vector" from a 2D m...

6 months ago | 0

why is it not plotting?? blank graph

Why do you comment the lines of calculate y1 and y2? % Ecuaciones Diferenciales Ordinarias dy/dx=f(x,y) a resolver ------------...

6 months ago | 0

| accepted

How to delete rows from matrix

Hello, This may help: SP_U(ismember(SP_U, SP_d,'rows'),:)=[];

6 months ago | 0

| accepted

How can I append table to csv file?

Hello, dlmwrite cannot deal with table, but take numetric matrix or cell, such as [1 2 3] or {1,2,3}. You may take the values ...

6 months ago | 0

Can MATLAB be installed on Apple MacBook Pro 16 (Apple M1 pro met)?

Yes, R2020b update3 and later is working on Rosetta 2 translation including Simulink and almost all toolbox. The latest version ...

6 months ago | 0

max value of N arrays

You can concatenate all the vectors and use function of max by the given dimension. For example x=[1,3,6,9].'; y=[2,4,5,8].'; ...

7 months ago | 0

How to merge two .mat files?

If they share the same variable name (for example 'data'), you can load them into different structure and merge. s1=load('file1...

7 months ago | 0

| accepted

How do you select a particular geographic area for NetCDF files?

Both the variables of 'LAT' and 'LON' are 2-dim, but you treated them as 1-dim. Hence you get a very large number of count([8512...

7 months ago | 0

convert vector of character to number

It depends on how you translate a word, for example: % s in this form is not a cell, but a character array s=['A' 'A' 'A' 'B' ...

7 months ago | 0

Reshape Nx1 struct with field of Mx1 elements to N*Mx1 vector

This is an example: bar=rand(100,1) A=struct; A.bar=bar; % copy A.bar to all 1000 elements A(2:1000,1)=A(1) % table is a g...

7 months ago | 0

Plot diagramm, i have overlapping axes.

The TiledChartLayout object may not be an input of 2nd axes in your code. You can try to change ax2=axes(t); to yyaxis left...

7 months ago | 0

How can I extract rows using column values?

% random matrix A=randi(50,10) % needed lines index ind=ismember(A(:,1), [0:9, 49, 55, 11, 32, 13, 29, 30, 20, 33, 43, 24]); ...

7 months ago | 1

批量合并.csv为一个.xlsx文件

函数本身并未限制文件数量。 建议你检查一下输出的文件，例如是否超过给定格式的行数限制（xls最多约6万行，xlsx最多约100万行）

7 months ago | 0

| accepted

Copy & paste from Help Center to MATLAB (Mac version)?

Sometimes, Command + C will copy text with its format such as font, color and hyperlink. Therefore, some apps may not recognize ...

7 months ago | 0

How to know the value on the coordinates that i circled at MATLAB Function? Like (0,Y)=3.57

Interpolation on x=0 and y=0 (or any number you need); You may change the method from linear (default) to someone else. x=0:0.1...

7 months ago | 0

HELP how to esc by the command system ?

You can add "&" at the end of command to run it in backgroud. system('mkdir aaa &')

8 months ago | 0