Creating a *.mat file

Hello, I want to create a *.mat file, for example named bathymetry. This array called bathymetry I want to be formed by 3 other arrays, for example, x, y and z. In a way, that when I charged the mat file it transforms into three files called x, y and z.

I've tried my easy way: for example: bathymetry=[x,y,z], but when I charged it, it's only 1 file called bathymetry and I want to have them separetely.

Please help me.

[the cyclist]

I don't know what you mean by "charge" the mat file.

[Thorsten]

probably "load" (German "laden" can be translated as "charge" or "load", depending on context)

Answer 1

[Azzi Abdelmalek]

X=10
Y=20
Z=30
save bathymetry X Y Z

To load your data

 load bathymetry

[chaos4u2]

Thank you!!

[Annanya]

which file extention to use to save mat file

[Saytam Maddeshiya]

.mat

Answer 2

[the cyclist]

Do you mean this?

% Create some variables
x = rand(3);
y = magic(3);
z = eye(3);

% Save the variable x,y,z into one *.mat file
save bathymetry.mat x y z

% Clear them out of the workspace
clear x y z

% Load them again
load bathymetry.mat

[chaos4u2]

Thank you!!

[eevee]

Hi,

May I know how to do the other way round? I have got a .mat files with x,y,z. And I need to save the x,y,and z variables into a .xyz file in matlab?

Thanks!

[the cyclist]

What is a .xyz file?

Also, I suggest you open a new question, with full details of your question, instead of burying your question as a comment in a year-old thread. It was pure luck that I happened to stumble on your comment.

[Walter Roberson]

Machine Learning & Power Systems Ali comments

error when i save in .mat

[Walter Roberson]

Machine Learning & Power Systems Ali: we are going to need more detail than that. What is your code, and what is your exact error message?

Answer 3

[matija corak]

Hello, I need help. I was record on my phone a sound. I want to hear that sound in matlab. How to do that? Thanks.

[matija corak]

I already tried with load and audioread and so on. Than I tried that sound convert in .wav and he still does not recognize that file. When I put for example load pcela.wav % pcela.wav is my name of that recorded sound Error using load Unknown text on line number 1 of ASCII file pcela.wav "RIFF’_".

Am I doing something wrong? Please help me I don't have no idea anymore and I cant find anything similar on web.

Answer 4

[Lobna Ragab]

How can I add many records to that file, I mean like

save filename X Y

X = 1,2,3,4
Y = 5,6,7,8

like table?

[nitish kumar]

just use the array like

X=[1,2,3,4]

Y=[5,6 7,8]

save filename.mat X Y

Answer 5

[geetu yadav]

svmStructDisease = svmtrain(diseasefeat,diseasetype); in this code how to create diseasefeat and diseasetype file?

[Shivaprasad S]

Same problem I am also facing please give some idea how to create I don't know anything please

Answer 6

[Machine Learning Enthusiast]

 @ the cyclist

[Bjorn Gustavsson]

That typically means that you don't have write permissions in the current directory. Move to somewhere else (cd...) and try again.

HTH

[Walter Roberson]

You are probably cd'd to a directory that is underneath the MATLAB installation. The directory that MATLAB starts executing in is not necessarily your personal MATLAB directory.

Answer 7

[ramya anandan]

thank you so much Bjorn Gustavsson

[Santhan S]

Thanks a lot.....

Answer 8

[Saravanan Nagesh]

@Machine Learning Enthusiast

Check the following code for the path of the current Matlab folder

path = pwd

use 'cd' to change it to another folder with write access.

usually, the default folder for Matlab code in most cases is" 'C:\Users\xxx'"

changing it to another drive solves this

Answer 9

[tuncel3]

First define a file name with its location

saveFileName='datafiles\filename2.mat';

next use below code to create an empty .mat file

save(saveFileName);