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I am trying to plot a function f(x).  Within the definition of f(x) I have some parameters, e.g., a, b, c tha have been defined.  Then these three parameter define a new parameter R.

The function is f(x)=R x.

 

 

a := 1;              Define a
1

b := 2;              Define b
2


c := 3;               Define c
3

R = a+2*b+3*c; Define R from a, b, c

R = 10 + 2 b~ (it should had given me 14)

F(x):=R*x;  Define the function
x -> R x


plot(R*x, x = -5 .. 5);   RECEIVE ERROR
Warning, expecting only range variable x in expression R*x to be plotted but found name R

 

 

I also tried to define R as R(a,b,c) and then F as F(R,x)...

but still it doesnot work.

Can anyone direct me to the right solution?

 

Thanks in advance.

NM

command vs function...

October 27 2013 stasya 15

In some tutorials for certain "Maple-words" a name "command" is used, while others use "function".

What is the difference between "function" and "command" in Maple?

How would I write a function that produces true if a vector/ line satisfies 3 linear inequalities and false if it does not satisfy all 3 linear inequalities? Ie
If the vector <m,n> satisfies ax+by+c>0, dx+ey+f>0 and gx+hy+i>0 then the function returns true, and if it does not satisfy one or more then it returns false? Thanks very much for your time.

How do I define a function from a graph in a plot? 

Or how do I find the intersection between two lines? I have to find the intersection of 2 lines in a graph, while one of these lines consists of 2 different equations dependent from the same variable. 

 

Thanks in advance. 

Can anybody tell me what error is in the following function?

F:= ([[a,b], [c,d], [e,f]]) -> (1/2) abs((c-a)(f-b)-(e-a)(d-b));

Thank you!

Dear All,

I need your help, what function in Maple must be used to find the different form of this function

f := product((p*beta[1]*(t[i]/theta[1])^(beta[1]-1)*exp(-(t[i]/theta[1])^beta[1])/theta[1])^Y[i]*((1-p)*beta[2]*(t[i]/theta[2])^(beta[2]-1)*exp(-(t[i]/theta[2])^beta[2])/theta[2])^(1-Y[i]), i = 1 .. n)

into this function

Hey everyone. Another question. I am getting a bug I have never gotten before - it's really bizarre. I have a sheet that works perfectly fine. All the functions are defined normally and they work properly. Then, when I get to the bottom of the sheet and try to define

> pathZ(r,theta):=(1- Heaviside(theta-Pi/(12)))*centralR*theta+Heaviside(theta-Pi/(12))*(centralR*Pi)/(12);

I get nothing being defined. I press enter while at that line and then it just goes...

Hi,

I have a function of n variables

y := (a,b .. n) → ....

For this function I need also n input values

y(x1,x2, ... ,xn)

The vector x has the input values ("x1,x2, ... ,xn") but how can I call them without typing them one by one?

Any ideas?

inverse of a function...

August 21 2013 samah 15
Hi I want to obtain the inverse of the following cumulative function: F(x)=1/n ∑_(i=1)^n(1-e^(-β/h (x-x_i-γh) ) )

i do not have a handbook of function properties, or properties from analysis

is there someone written a package to list which properties a function have after input a function?

Maple people:

 

The title is the question.  I defined a function in Maple, which works.  I am trying to get Maple to compute its derivatives.  I want to save the derivatives as functions.  Here is a code snippet.  The function itself works.  I have uploaded the worksheet.  Mapleprimes seems to have copied the entire worksheet into this question when I uploaded the worksheet. 

 

[begin code snippet]

a := f(x,y) = f(y,x)

how to get x and y from left side f(x,y)

and get y and x from right side f(y,x)?

how can i define a matrix as a sunction of a variable so that when i chande the independet variable,the elements of the matrix also change?

A(t):=[a[t],b[t],c[t]] ; i want to define a function like this,so that by changing the time t,the elements of the matrix also change,what should i do?

hi

I have an unkhown function as f(r) which i want to solve it at the end of calculation. How can i define it in beggining?

I want to write g as a function of sigma^2.

but

g := unapply(1/sqrt(1+3*q^2*sigma^2/Pi^2), sigma^2);

yields an error. how to do?

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