Invalid use of operator when trying to input function

>> t = linspace(0,0.001);
>> v = 12-8*exp(-200000*t).+800000*t*exp(-200000*t);
 v = 12-8*exp(-200000*t).+800000*t*exp(-200000*t);
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Invalid use of operator.
 
>> 

What am i doing wrong?

[Stephen23]

"What am i doing wrong?"

There is no .+ operator:

https://www.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html

Answer 1

[KSSV]

Read about MATLAB element by element operations.

t = linspace(0,0.001);
v = 12-8*exp(-200000*t)+800000*t.*exp(-200000*t);