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How can I replace eval and rewrite the below line?

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Harini pushparaj
Harini pushparaj 2017-11-1
评论： OCDER 2017-11-1
Hi..How can I replace eval..when I tried this way
Speed =Data.(cycle_name(1:end-4)).Data;
Time=Time.(cycle_name(1:end-4)).Time;
it is giving me some error saying Undefined variable "Data" or class "Data.FTP.Data".
eval(['Speed = ' cycle_name(1:end-4) '.Data;']);
eval(['Time = ' cycle_name(1:end-4) '.Time;']);
  2 个评论
Stephen23
Stephen23 2017-11-1
The solution will be to load your data properly, into an output variable (which happens to be a structure). If you want help with this then please edit your question and upload a sample .mat file so that we can check our code on your data.

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回答（1 个）

OCDER
OCDER 2017-11-1
编辑：OCDER 2017-11-1
NEW ANSWER:
Inside the FTP.mat is a variable called ts storing the timeseries object. To access the contents inside ts, do this:
Z = load(fullfile('..\cycledata',cycle_name)) % Z is a temporary variable
Speed = Z.ts.Data;
Time = Z.ts.Time;
OLD ANSWER:
Assuming you have a non-scalar structure called cycle_name that has at least 5 elements, this should work:
Speed = cycle_name(1:end-4).Data;
Time = cycle_name(1:end-4).Time;
  16 个评论
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OCDER
OCDER 2017-11-1
Starting from the beginning... Set your working directory to the folder storing FTP.mat. Then do this:
clear
load('FTP.mat')
Do you atleast get ts variable show up in your workspace?
Note that "..\cycledata\FTP.mat" means go to the folder above the current directory, then to cycledata folder, then the FTP.mat file inside there. My hunch is, there is another FTP.mat file, just not in your current directory that you want.
The FTP.mat file you showed in the screenshot picture DOES show the ts variable.
HOWEVER, the result from whos command does not show the ts variable, and instead show a variable called FTP that is the timeseries. Hence, it seems you are not loading the correct .mat file.

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