Hi!

I use 'alias' to define variable dependencies.
But when I want to use the result of my calculation as an expression, I bite the dust; I cannot get rid of the dependencies.
Can anyone help me here?

In the simplified example below, I use the independent variables z[3] and z[4] to define z[1](z[3],z[4]) and z[2](z[3],z[4]).
I then introduce a function f[1](z[3],z[4]) and its derivatives df_dz.
I introduce the names dz[1]/dz[3]=Dp[1,3], dz[1]/dz[4]=Dp[1,4] etc...
When I have calculated df_dz[3], however, I cannot insert values of z[2] without affecting Dp[2,3].
Actually, now I have finished my calculation and want df_dz[2,3] to be a regular expression, so that I can insert values of
z without affecting the Dp:s.
How can I convert df_dz[3] to a regular expression?

alias( seq(z[i]=z[i](seq(z[j],j=3..4)),i=1..2)):
alias(f=f(seq(z[j],j=3..4))):
alias(seq(seq(Dp[m,n]=diff(z[m](seq(z[j],j=3..4)),z[n]),m=1..2),n=3..4)):

f:=z[1]-z[2]*z[3]:

for j from 3 to 4 do
df_dz[j]:=diff(f,z[j]);
od:

df_dz[3];
subs(z[2]=4711,df_dz[3]);
whattype(Dp[1,3]);
whattype(z[3]);




function

indexed

Hi there,

I'm relativly new to maple and right now I'm trying to plot a couple of points (as part of a TSP-Solution) by doing the following:

with(plots):

p := [[565,575],[685,595],[700,580],[770,610]];

pointplot(p, connect=true);

Unfortunately it doesn't number the points. What I'm trying to do is that the above four points have a number or an index so I can see which point is where. 

Is there a way to do this?

thanks

restart:

Eq1:=x=(phi*(theta[m]-1/x)/theta[m]+(1-phi)/2);

solve({Eq1},x);

x := (1/4)*(phi*theta[m]+theta[m]+sqrt(phi^2*theta[m]^2+2*phi*theta[m]^2-16*phi*theta[m]+theta[m]^2))/theta[m];

Now plotting the first root

p1:=plot(subs(phi=0,x),theta[m]=0..14,color=red):
p2:=plot(subs(phi=0.1,x),theta[m]=0..14,color=green,linestyle=2):
p3:=plot(subs(phi=0.5,x),theta[m]=0..14,color=blue,linestyle=3):
p4:=plot(subs(phi=1,x),theta[m]=0..14,color=black):
display({p1,p2,p3,p4},axes=boxed,view=[0..14,0..1]);

Note: I'm unable to reproduce the following plot. Any idea?

 SA.mw

The following is taken from p 328 of the Maple TA manual.

\documentclass[12pt]{article}
\usepackage{ed}
\begin{document}

\begin{question}{Formula}
% This question uses randomized variables.
\qutext{Find the formula for the inverse of the function
$f(x)=\var{a}x+\var{b}$.}
\answer{(x-\var{b})/\var{a}}
\code{
$a=int(rint(9)+2);
$b=int(rint(9)+2);
}
% The above code chooses random integer coefficients a and b between
% 2 and 10.
\end{question}

\end{document}

Running it though the online compiler generates the following when Service Pack 1 checkbox is UNCHECKED

Note: Successful conversion from LaTeX to QU does not guarantee that your testbank will load into Maple T.A. correctly. Please examine the contents of the box below for any additional errors that may be generated when your testbank is loaded into Maple T.A.

l2e_pkIwct.qu: Error at line 3.
Line ended while reading variable name (missing "=" at end of name?)

(A response of "[OK]" indicates that there should be no problems uploading your converted testbank file to Maple T.A.)

and the following when it is CHECKED

...

[30] [31] [32] [33] [34] [35] [36] [37] [38] [39] [40] [41] [42] [43] [44]
[45] [46] [47] [48] [49] [50] [51] [52])
(/usr/local/latex2edu/newt4ht/texmf/tex/generic/tex4ht/html-mml.4ht)
(/usr/local/latex2edu/texmf/tex/local/ed/ed.4ht [53] [54]))
(/usr/local/latex2edu/newt4ht/texmf/tex/generic/tex4ht/html4.4ht)
(/usr/local/latex2edu/newt4ht/texmf/tex/generic/tex4ht/unicode.4ht)
(/usr/local/latex2edu/newt4ht/texmf/tex/generic/tex4ht/html4-uni.4ht)
(/usr/local/latex2edu/newt4ht/texmf/tex/generic/tex4ht/mathml.4ht)
(/usr/local/latex2edu/newt4ht/texmf/tex/generic/tex4ht/html-mml.4ht)
(/usr/local/latex2edu/texmf/tex/local/ed/ed.4ht))
No file l2e_yQsgNQ.aux.
)
*
! Emergency stop.
<*> \def\production{}\input l2e_yQsgNQ.tex

Output written on l2e_yQsgNQ.dvi (54 pages, 25316 bytes).
Transcript written on l2e_yQsgNQ.log.

What's going on?

I've got two matrices A and B that I've verified are similar using IsSimilar()

The description of the function says the third argument 'P' stores the transformation matrix. Does this P have to be initialized and if so, then how can it be done?

I'm a student. I want to purchase oline Maple Student, but I can't.

Please send me a feedback as soon as possible. Thanks.

I am attempting to plot an initial value problem in Maple 18.  I have my equation defined, as well as a general solution and two particular solutions at y(0)=3/4 and y(0)=1/2.  To graph, I entered the command

DEplot(de,y(x),x=-3..3,{[0,1/2],[0,3/4]},dirgrid=[12,12],color=black,linecolor=blue,thickness=2);

but instead of returning a graph, the software gave me the error message

Error, (in DEtools/DEplot/CheckDE) extra unknowns found: sinx

The Maple support site lists this as an unknown error, and as a new user, I'm not sure what to do.  What does this mean?

hello

I have a system of equation. to solve i using DirectSearch pakage. i think in answer DirectSearch use rounding number but in answer it's second and third digit after the decimal point is important. please help me. bbw.mw

if b and c increase 0.01 and -0.01 it's ok. another main question is why by increasing the intensity answer don't change.

Hi everyone,

I've been having a problem trying to correct this procedure so that it will accept empty tables as well. This is the code I've been messing up with:

6.10.mw

If someone could help me with this, it would be really appreciated.

Hi,

So I have a simple while loop and keep receiving this error and have no idea how to fix it. I don't get why it works for the first few, and then the error starts. Here is my code and output:

Input:

restart;
n:=0:
x:=Pi/3;
m:=0:
total:=0:
while abs(1/2-total) > 10^(-8) do
k:=((-1)^(n/(2))*x^(n))/(n!):
total:= total +k;
evalf(total, 11);
print(%);
n:=+2;
end do:

OUTPUT:
1
- Pi
3
1.
0.45168864437
Error, cannot determine if this expression is true or false: 0 < -50000001/100000000+(1/18)*Pi^2

Why does it think i'm asking if something is greater than 0? Any help??

I wish to convert:

Sum(x[k],k=1..n)*Sum(y[k],k=1..m) -> Sum(Sum(x[j]*y[k],j=1..n),k=1..m)

Can anybody show me an elegant way to do it?

Gracias

Hello:

I have a simple program to find the intercepts of an equation but I would like to program to ask the user:Would you like the run the program again?  Below is my code:

interceptslope()

all the program stuff

end proc:

Do you want to run the program again? Yes/No

How do I call the program again

Lonnie

Good day everyone, how can one check for the congence of numerical solution of this ODE in maple? See it here 1.mw

Best regards.

Hi,

I recently reinstalled OSX (from Mavericks to Yosemite), and since then, Maple wont solve. Neither in document or worksheet mode. I have never seen the error before, and cannot find any help online.

"

solve(x-8*(1/12) = 0, x)
Error, (in solve) invalid input: hastype expects 2 arguments, but received 1

> solve(x-8*1/12=0,x);
Error, (in solve) invalid input: hastype expects 2 arguments, but received 1

solve({x-8*y = 0, 2*x-4*y = 1}, [x, y])
Error, (in solve) invalid input: hastype expects 2 arguments, but received 1

 "

Restarting maple does nothing.

Anyone know what's wrong? My schools license for older versions of Maple are expired, so haven't tried that.

Thanks a lot.

Can the spacing between gridlines on a plot be modified? i.e., can I have more lines?