Why can't i use "from file" block in simulink

Question

Baris Can 2012-11-30

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评论： satish kumar 2020-8-11

i have a .mat file that i want to use in simulink using "from file" block

you can look it up from this link https://www.dropbox.com/s/lhyrsan02wz3cl4/force.mat

i put a "from file" and "scope" blocks into simulink and then connect them with each other.

i configured sample time in from file block as 1 that is equal to same sample time in .mat file and used fixed step ode3 solver with auto fixed-step size.

when i run, matlab gives no error, but i see this http://s7.postimage.org/y8ue6cmwr/matlab.png when i open scope

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Answer 1

Azzi Abdelmalek 2012-11-30

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https://ww2.mathworks.cn/matlabcentral/answers/55261-why-can-t-i-use-from-file-block-in-simulink#answer_67048

编辑：Azzi Abdelmalek 2012-11-30

The problem is how you saved your data. Example

 t=0:0.1:10; % vector time 
 y=sin(t)  % t and y are line vectors
 ty=[t;y]  % ty should be a matrix with 2 rows
 save filename ty

Now you can use your file in your simulink model. I think that you saved ty with two columns instead of 2 rows,

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satish kumar 2020-8-11

Hello, i tried to load the data: t=[45, 67,8.9,6.7,5.5,3.2,5.6,7.9] into simulink using " from file " block in simulink. t is saved as .mat file. t is generated from matlab code. I am facing problem in loading all the points in simulink. the first data point in t, i.e. t(1)=45 is not loaded in simulink. others have been successfully loaded. Please help how to load data in array form like this without missing first point. kindly help.

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Answer 2

Baris Can 2012-11-30

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https://ww2.mathworks.cn/matlabcentral/answers/55261-why-can-t-i-use-from-file-block-in-simulink#answer_67051

编辑：Baris Can 2012-11-30

i solved the problem, i realized that i was trying to use only one column instead of two columns, i misread that number of rows as a time-serie column that i already wrote, also the block that i need to use wasn't from file, it was from workspace block.

thanks for answers.