How to save a structure as .mat?
2 views (last 30 days)
Show older comments
I am trying to save a 1x6 structure named 'PIN' as a .mat file. When I attempt to use save(newfilename.mat,'PIN'), I get this error: Attempt to reference field of non-structure array.
How would I go about saving this structure as a .mat file with the specified name?
projectdir = 'C:\Users\it58528\Documents\Dig Test'; %Start here. or name an absolute directory
newdir = 'C:\Users\it58528\Desktop\Test';
folderinfo = dir(projectdir);
folderinfo = folderinfo([folderinfo.isdir]); %select only the directories
folderinfo = folderinfo(~ismember({folderinfo.name}, {'.', '..'})); %remove directories . and ..
%%%%%%%%%%%%%%%%%Digs for Files/Reads/Saves %%%%%%%%%%%%%%%%%%%%%
for folderidx = 1 : length(folderinfo)
thisfolder = fullfile(projectdir, folderinfo(folderidx).name);
subfolderinfo = dir(thisfolder);
subfolderinfo = subfolderinfo([subfolderinfo.isdir]); %select only the directories
subfolderinfo = subfolderinfo(~ismember({subfolderinfo.name}, {'.', '..'})); %remove directories . and ..
folderidxi = folderinfo(folderidx).name;
newfolder = fullfile(newdir, folderidxi);
mkdir(newfolder);
for subfolderidx = 1 : length(subfolderinfo)
subfolderi = subfolderinfo(subfolderidx).name;
thissubfolder = fullfile(thisfolder, subfolderi);
fileinfo = dir( fullfile(thissubfolder, '*.csv') );
newsubfolder = fullfile(newfolder, subfolderi);
mkdir(newsubfolder);
for fileidx = 1 : length(fileinfo)
filenamei = fileinfo(fileidx).name;
thisfile = fullfile(thissubfolder, filenamei);
[filepath, basename, ext] = fileparts(thisfile);
data = csvread(thisfile,5,2);
PIN(fileidx).PIN = fileinfo(fileidx).name(1:17);
%FIX THIS PIN(fileidx).serialnumber = data(1,2); //serial number
PIN(fileidx).loadprofile = data(1:15,:);
PIN(fileidx).hours = sum(sum(PIN(fileidx).loadprofile,1));
PIN(fileidx).loadprofilepercent = PIN(fileidx).loadprofile./PIN(fileidx).hours;
PIN(fileidx).loadpercent = data(:,2);
PIN(fileidx).RPM = data(16,:);
loadprofilecolumn = find(PIN(fileidx).RPM>Resonance);
xSpeed = PIN(fileidx).RPM(loadprofilecolumn(1)-1);
newfilename = fullfile(newsubfolder, filenamei);
save(newfilename.mat,'PIN'); %%%%FIX
end %files within subfolder
end %subfolders within folder
end %folders
2 Comments
Stephen23
on 26 Dec 2020
Original question by Ibro Tutic on 4th November 2015 retrieved from Google Cache:
How to save a structure as .mat?
I am trying to save a 1x6 structure named 'PIN' as a .mat file. When I attempt to use save(newfilename.mat,'PIN'), I get this error: Attempt to reference field of non-structure array.
How would I go about saving this structure as a .mat file with the specified name?
projectdir = 'C:\Users\it58528\Documents\Dig Test'; %Start here. or name an absolute directory
newdir = 'C:\Users\it58528\Desktop\Test';
folderinfo = dir(projectdir);
folderinfo = folderinfo([folderinfo.isdir]); %select only the directories
folderinfo = folderinfo(~ismember({folderinfo.name}, {'.', '..'})); %remove directories . and ..
%%%%%%%%%%%%%%%%%Digs for Files/Reads/Saves %%%%%%%%%%%%%%%%%%%%%
for folderidx = 1 : length(folderinfo)
thisfolder = fullfile(projectdir, folderinfo(folderidx).name);
subfolderinfo = dir(thisfolder);
subfolderinfo = subfolderinfo([subfolderinfo.isdir]); %select only the directories
subfolderinfo = subfolderinfo(~ismember({subfolderinfo.name}, {'.', '..'})); %remove directories . and ..
folderidxi = folderinfo(folderidx).name;
newfolder = fullfile(newdir, folderidxi);
mkdir(newfolder);
for subfolderidx = 1 : length(subfolderinfo)
subfolderi = subfolderinfo(subfolderidx).name;
thissubfolder = fullfile(thisfolder, subfolderi);
fileinfo = dir( fullfile(thissubfolder, '*.csv') );
newsubfolder = fullfile(newfolder, subfolderi);
mkdir(newsubfolder);
for fileidx = 1 : length(fileinfo)
filenamei = fileinfo(fileidx).name;
thisfile = fullfile(thissubfolder, filenamei);
[filepath, basename, ext] = fileparts(thisfile);
data = csvread(thisfile,5,2);
PIN(fileidx).PIN = fileinfo(fileidx).name(1:17);
%FIX THIS PIN(fileidx).serialnumber = data(1,2); //serial number
PIN(fileidx).loadprofile = data(1:15,:);
PIN(fileidx).hours = sum(sum(PIN(fileidx).loadprofile,1));
PIN(fileidx).loadprofilepercent = PIN(fileidx).loadprofile./PIN(fileidx).hours;
PIN(fileidx).loadpercent = data(:,2);
PIN(fileidx).RPM = data(16,:);
loadprofilecolumn = find(PIN(fileidx).RPM>Resonance);
xSpeed = PIN(fileidx).RPM(loadprofilecolumn(1)-1);
newfilename = fullfile(newsubfolder, filenamei);
save(newfilename.mat,'PIN'); %%%%FIX
end %files within subfolder
end %subfolders within folder
end %folders
Accepted Answer
Kirby Fears
on 4 Nov 2015
newfilename is a variable in your workspace when you define it as
newfilename = fullfile(newsubfolder, filenamei);
In your first argument to save(), you say "newfilename.mat", which attempts to access the mat field of object newfilename. Hence the error Attempt to reference field of non-structure array.
Try this syntax instead:
save(newfilename,'PIN');
Or if you really want to tag ".mat" on the end explicitly:
save([newfilename,'.mat'],'PIN');
2 Comments
More Answers (0)
See Also
Categories
Find more on File Operations in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!