I keep getting this datatype float[8] error, can some1 please help me. 
upload the mw file here faq.mw

Also i have a working for lopp and want to make a procedure. 
Any suggestions will be helpful as well. Thanks.

This is a given set of equations (from a classifier problem in deep learning):

I tried to replicate the expression in Maple, but it was unsuccessful. 

Q_MaplePrime20200417.mw

Would you tell me how to make it work?

Then, please let me know how to refer to a previous result (equation number) in the current expression. 

The last line above (and the attached Maple document) shows my attempt, It did not work. 

Thank you/Be healthy!

Hello,

How to solve this error? Thank you

Sistem := diff(E[1](t), t) = subs(E[1] = E[1](t), L[1] = L[1](t), P[1] = P[1](t), M[1] = M[1](t), E[2] = E[2](t), L[2] = L[2](t), P[2] = P[2](t), M[2] = M[2](t), Data, dE1), diff(L[1](t), t) = subs(E[1] = E[1](t), L[1] = L[1](t), P[1] = P[1](t), M[1] = M[1](t), E[2] = E[2](t), L[2] = L[2](t), P[2] = P[2](t), M[2] = M[2](t), Data, dL1), diff(P[1](t), t) = subs(E[1] = E[1](t), L[1] = L[1](t), P[1] = P[1](t), M[1] = M[1](t), E[2] = E[2](t), L[2] = L[2](t), P[2] = P[2](t), M[2] = M[2](t), Data, dP1), diff(M[1](t), t) = subs(E[1] = E[1](t), L[1] = L[1](t), P[1] = P[1](t), M[1] = M[1](t), E[2] = E[2](t), L[2] = L[2](t), P[2] = P[2](t), M[2] = M[2](t), Data, dM1), diff(E[2](t), t) = subs(E[1] = E[1](t), L[1] = L[1](t), P[1] = P[1](t), M[1] = M[1](t), E[2] = E[2](t), L[2] = L[2](t), P[2] = P[2](t), M[2] = M[2](t), Data, dE2), diff(L[2](t), t) = subs(E[1] = E[1](t), L[1] = L[1](t), P[1] = P[1](t), M[1] = M[1](t), E[2] = E[2](t), L[2] = L[2](t), P[2] = P[2](t), M[2] = M[2](t), Data, dL2), diff(P[2](t), t) = subs(E[1] = E[1](t), L[1] = L[1](t), P[1] = P[1](t), M[1] = M[1](t), E[2] = E[2](t), L[2] = L[2](t), P[2] = P[2](t), M[2] = M[2](t), Data, dP2), diff(M[2](t), t) = subs(E[1] = E[1](t), L[1] = L[1](t), P[1] = P[1](t), M[1] = M[1](t), E[2] = E[2](t), L[2] = L[2](t), P[2] = P[2](t), M[2] = M[2](t), Data, dM2);
Error, invalid input: subs received Data, which is not valid for its 9-th argument

Hi,

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diff(z, t)+(diff(R, x))*L+A*(diff(L, x))+diff(k, x, x)-(diff(k, t, t)) = 0

Thanks.

D(u(x,t),t,t)=c^2*D(u(x,t),x,x);

Where u(x,0)=f(x),D[2](u)(x,0)=g(x),u(0,t)=0=u(L,t),L=2

please do this as mentioned above

Dear all

I use Maple 2018 and have following problem:

I define following procedure and want to plot it. However Maple displays the coordinate system but does not plot anything nor gives and error message. Hope you can help.

Thanks

Murad

b:=proc(n)
local b,i:
 for i from 0 to n do
  if i=0 then
   b[0]:=0:
  elif i=1 then
   b[1]:=1:
  else
   b[i]:=(b[i-1]+b[i-2])/2:
  end if:
 end do:

return b[n]

end proc:

plot(b,0..10)

Why was the question and answer deleted for this?

https://www.mapleprimes.com/questions/229329-How-Can-We-Solve-Following-1D-Wave-Equation

proctes.mw

load this Maple code done'nt work!!!

Hi All

I've been trying to plot multiple data sets using the dataplot function but it doesn't seem to work. It just outputs what I've written. I was wondering is there some package I need to run dataplot? Or is there any other way to plot multiple data sets? 

Thanks in advance