Plot time against numbers

Hi, I have got the following lines of code:

aa = dataraw_GSR_RELAXING.CREATION_TIME(1:283)
bb = dataraw_GSR_RELAXING.VALUE(1:283)
plot(aa,bb)

aa corresponds to a column with times as is shown in the screenshot below.

bb is a column with the same size but instead of times it has numerical values.

When I try to plot the values against the time, I get a message saying 'Invalid data argument'.

Could someone please teach me how to plot this? I looked into examples from the forum and tried to reproduce but without success.

Thanks in advance for your help.

Answer 1

[Walter Roberson]

aa = cell2mat(dataraw_GSR_RELAXING.CREATION_TIME(1:283));
bb = cell2mat(dataraw_GSR_RELAXING.VALUE(1:283));
plot(aa, bb)

[Ana Campos]

Hi Walter,

Thanks for your time.

Unfortunately it did not work. I get the following message:

"Brace indexing is not supported for variables of this type.

Error in cell2mat (line 42)

cellclass = class(c{1});

Error in PhD_Experiment_2_GSR_wip (line 325)

bb = cell2mat(dataraw_GSR_RELAXING.VALUE(1:283));"

[Walter Roberson]

aa = cell2mat(dataraw_GSR_RELAXING.CREATION_TIME(1:283));
bb = dataraw_GSR_RELAXING.VALUE(1:283);
plot(aa, bb)

[Ana Campos]

Hi Walter,

Unfortunately that does not do the trick either.

"Error using plot

Invalid first data argument.

Error in PhD_Experiment_2_GSR_wip (line 328)

plot(aa, bb)"

If relevant - this is what my table looks like (from where I am extracting the data)

aa = cell2mat(dataraw_GSR_RELAXING.CREATION_TIME(1:283));
bb = dataraw_GSR_RELAXING.VALUE(1:283);
plot(aa, bb)

[Ana Campos]

It plots just the 'VALUE'. When I try to plot VALUE against CREATION_TIME it does not work.

[Walter Roberson]

aa = duration(dataraw_GSR_RELAXING.CREATION_TIME(1:283));
bb = dataraw_GSR_RELAXING.VALUE(1:283);
plot(aa, bb)

[Ana Campos]

Thanks for your help!

[Peter Perkins]

Ana, Walter seems to have gotten you back in business, but I will just add that you may have wanted to read your data using readtimetable, not readtable. That would have put you one step closer to that plot.

[Ana Campos]

Hi Peter,

Another tip to add to the list then! Thanks for taking the time to comment too. I’ll keep that in mind for when I need it next. Cheers!