Preben Alsholm

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20 years, 249 days

MaplePrimes Activity


These are replies submitted by Preben Alsholm

You are referring to mbogo:

http://www.mapleprimes.com/questions/139205-Graphing-And-Parameter-Sensitivity-Analysis

I don't believe Maple can help you solve that type of problem.

You are referring to mbogo:

http://www.mapleprimes.com/questions/139205-Graphing-And-Parameter-Sensitivity-Analysis

I don't believe Maple can help you solve that type of problem.

@Adri vanderMeer van der Meer I think it is a floating point issue.

Consider the output from these lines:

restart;
f:=proc(theta::numeric) print(theta); csc(theta)^2 - cot(theta)^2 end proc;
plot(f, 0..2*Pi,numpoints=5,adaptive=false,style=point ,symbolsize=20);
plottools:-getdata(%);
A:=%[-1];
A[4,1];
f(%);
seq( evalf[n](f(A[4,1])),n=10..25);

@Adri vanderMeer van der Meer I think it is a floating point issue.

Consider the output from these lines:

restart;
f:=proc(theta::numeric) print(theta); csc(theta)^2 - cot(theta)^2 end proc;
plot(f, 0..2*Pi,numpoints=5,adaptive=false,style=point ,symbolsize=20);
plottools:-getdata(%);
A:=%[-1];
A[4,1];
f(%);
seq( evalf[n](f(A[4,1])),n=10..25);

How is mean(X(t)) defined? And what about V(t)?

Since there is only one independent variable (t) you don't have a pde.

To avoid that the best is to go to

Tools/Options/Display/Input display : Choose Maple Notation

after that I would also go to

Tools/Options/Interface/Default format for new worksheets : Choose Worksheet

Finally click on the button Apply Globally

To see that these are in effect, open a new worksheet and start writing.

These options can always be changed, if you don't like them.

To avoid that the best is to go to

Tools/Options/Display/Input display : Choose Maple Notation

after that I would also go to

Tools/Options/Interface/Default format for new worksheets : Choose Worksheet

Finally click on the button Apply Globally

To see that these are in effect, open a new worksheet and start writing.

These options can always be changed, if you don't like them.

@Krischu If you use 1D input (Maple input) it is probably a good idea to define A before you introduce the values. That way you will be able to see if you typed correctly:

restart;
A := abs((-2*b/lambda^3-4*c/lambda^5)*2*a*sin(1/2*epsilon)/cos((delta[min]+epsilon)/2));
b := 24649.42;
c := -1.37*10^9;
lambda := 578;
a := 0.1e-2*10^9;
epsilon := 60*Pi*(1/180);
delta[min]:= 59.64*Pi*(1/180);
A;
evalf(A);


@Krischu If you use 1D input (Maple input) it is probably a good idea to define A before you introduce the values. That way you will be able to see if you typed correctly:

restart;
A := abs((-2*b/lambda^3-4*c/lambda^5)*2*a*sin(1/2*epsilon)/cos((delta[min]+epsilon)/2));
b := 24649.42;
c := -1.37*10^9;
lambda := 578;
a := 0.1e-2*10^9;
epsilon := 60*Pi*(1/180);
delta[min]:= 59.64*Pi*(1/180);
A;
evalf(A);


Try evalf(A);

It is easier for us to be helpful if instead of a picture you upload a worksheet via the fat green arrow in MaplePrimes.

Try evalf(A);

It is easier for us to be helpful if instead of a picture you upload a worksheet via the fat green arrow in MaplePrimes.

@Cody I have uploaded a worksheet. You should know that I don't know much about statistics, so use your own judgement!

MaplePrimes12-10-2.mw

@Cody I have uploaded a worksheet. You should know that I don't know much about statistics, so use your own judgement!

MaplePrimes12-10-2.mw

You seem to identify FAIL with false.

FAIL means "I don't know"
false means "It is wrong".

In Maple you could try

?FAIL

to see the help page for FAIL.

You seem to identify FAIL with false.

FAIL means "I don't know"
false means "It is wrong".

In Maple you could try

?FAIL

to see the help page for FAIL.

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