Extract Structure element dynamically

I have structure whose elements name change dynamically with respect to result file name.

I need an example code which extract structure elements from structure joinedtimetable 'joinedtimetable.Properties.VariableNames'

I need them for plotting the data like

size = numel(joinedtimetable.Properties.VariableNames)
for i = 1:numel(joinedtimetable.Properties.VariableNames)
    VariableNames = ExtractName(joinedtimetable.Properties.VariableNames(i);
end
subplot(size,y,i);plot(joinedtimetable.VariableNames(1),joinedtimetable.VariableNames(2));

Answer 1

[Turlough Hughes]

I would just convert it to a cell array which is easier to index through as you require

c=table2cell(timetable2table(joinedtimetable));

And then something like:

figure, hold on
for ii=1:size(c,2)
    plot([c{:,ii}])
end
legend(joinedtimetable.Properties.VariableNames,'Interpreter','none')

How do you want to represent the non numerical data in your plots though??

[Matlab]

I don't see the structure elements instead i get full cell arrays. Perhapes I can't use your code for analysis.

How do you want to represent the non numerical data in your plots though??

I use following code to plot text data,

endidx = size(joinedtimetable.WeirdDuration,1);
col = 'brckygmb';
subplot(1,1,1);
plot(joinedtimetable.WeirdDuration(1114-10:1114),(1114-10:1114),col(mod(endidx,7)+1)); grid on;title('servo-v4-uart');xlabel('TestTime[sec]');ylabel('Message')
text(joinedtimetable.WeirdDuration(1114-10:1114),(1114-10:1114),joinedtimetable.Message_servo_v4_uart1_servov4(1114-10:1114));

Do you have any better suggestion for plotting text data ?

[Turlough Hughes]

I think this should answer your original question

VariableNames=joinedtimetable.Properties.VariableNames
ii=5

Your code then is modified as follows:

endidx = size(joinedtimetable.WeirdDuration,1);
col = 'brckygmb';
subplot(1,1,1);
plot(joinedtimetable.WeirdDuration(1114-10:1114),(1114-10:1114),col(mod(endidx,7)+1)); grid on;title('servo-v4-uart');xlabel('TestTime[sec]');ylabel('Message')
text(joinedtimetable.WeirdDuration(1114-10:1114),(1114-10:1114),joinedtimetable.(VariableNames{1,ii})(1114-10:1114),'Interpreter','none');

[Matlab]

I didn't understand!!

Can you please write full snippet from data load point onwards.

For me for didn't go well. I get error. Can you please give me a working code. Thanks

>> load('matfile.mat');
>> c=table2cell(timetable2table(joinedtimetable));
>> figure, hold on
for ii=1:size(c,2)
    plot([c{:,ii}])
end
Error using plot
Invalid first data argument.

[Turlough Hughes]

This is the first option I was suggesting (updated now that I know what you are trying to plot)

load('matfile.mat')
VariableNames=joinedtimetable.Properties.VariableNames
c=table2cell(timetable2table(joinedtimetable));

endidx = size(joinedtimetable.WeirdDuration,1);
col = 'brckygmb';
figure, hold on
range=(1114-10):1114;

ii=6;
plot([c{range,1}],range,col(mod(endidx,7)+1))
grid on, title(VariableNames(1,ii-1)), xlabel('TestTime[sec]'), ylabel('Message')
text([c{range,1}],range,c(range,ii),'Interpreter','none');

Second option.

load('matfile.mat')
VariableNames=joinedtimetable.Properties.VariableNames

endidx = size(joinedtimetable.WeirdDuration,1);
col = 'brckygmb';
figure, hold on
range=(1114-10):1114;

ii=5    % Duration data is not identified with a variable, so the first variable in joinedtimetable
        % is in fact log_test_that1_test_that
plot(joinedtimetable.WeirdDuration(range),range,col(mod(endidx,7)+1))
grid on, title('servo-v4-uart'), xlabel('TestTime[sec]'), ylabel('Message')
text(joinedtimetable.WeirdDuration(range),range,joinedtimetable.(VariableNames{1,ii})(range),'Interpreter','none');

[Matlab]

Super thanks a ton!! Works well

[Matlab]

Can you please help me in getting the a GUI as well ?

Answer 2

[Fangjun Jiang]

%%
s.a=1:10;
s.b=rand(1,10);

EleNames=fieldnames(s);
plot(s.(EleNames{1}),s.(EleNames{2}));