## Area under the curves...

I have 2 functions, f(x) and g(x) both continous on [a,b] (a known interval). For which value of C ε [a,b] the area under f(x) and g(x) is minimal?

I know f(x) and g(x).

## Area under the curve...

I have 2 functions, f(x) and g(x) both continous on [a,b] (a known interval). For which value of C ε [a,b] the area under f(x) and g(x) is minimal?

I know f(x) and g(x).

## numpoints vs grid...

In implicitplot, to insure the accuracy  of a curve, I usually increase the number of points (numpoints=*** ) or increase the number of grids ( grid=[***,***] ). Both can improve the quality of the curve. And sometimes one works better than the other. But I don't quite understand the relationship between the two options , and which is more effective and more economical. Thanks.

## Implicitplot problem...

I want to plot  the astroid by the following code, but only the part in the first quadrant appears. I don't know that is wrong and how to solve the problem. Thanks.

with(plots):
a:=1:
implicitplot(x^(2/3)+y^(2/3)=a^(2/3),x=-a..a,y=-a..a);

## Error in statement breaks the loop - change this b...

Hello

I am running NLPSolve within a loop over some values of parameters. For one of the parameter values, the NLPSolve gives me

Error, (in Optimization:-NLPSolve) no improved point could be found

and exits the loop. How do I change this behaviour? I would like the loop to continue for other parameters.

I have tried interface(errorbreak=0) interface(errorcursor=false) but this didn't work.

Thank you, Best Regards

Jan Zapal

## Error in define_external - too many arguments in e...

In Maple 11 I need to write define_external procedure with 23 arguments.

For example:
test1 := define_external('myproc',
N1::(integer[4]),

## 5th ncrunch math program review

by: Maple

A few weeks ago I mentioned the ncrunch comparison of "mathematical programs for data analysis" in a comment in another thread.  There is now a new, 5th release of that review. The systems reviewed are:

• GAUSS
• Maple
• Mathematica
• Matlab
• O-Matrix
• Ox
• SciLab

The review is skewed towards statistical computation and data manipulation, but it includes several interesting comparisons of the major computer algebra systems (CAS).

There is a comparative performance section, and the worksheets used for that benchmarking are available for download. Here is the Maple worksheet, which was used with Maple 11.

## if statements...

Hi

how can i do this in maple

if(a>b>c) then 4

or maybe if(a>b) and if(b>c) then 4

## A case of trivial misunderstanding...

All:

This should be simple but I am clearly missing some of the nuances - can you please help me see what I am doing wrong?  I would like to solve 2 eqns in 2 unknowns:

eq15 := Kzeff15 = (Kvr*Kz15)/(Kvr+Kz15);

eq33 := Kzeff33 = (Kvr*Kz33)/(Kvr+Kz33);

Kz33 := (3.3/1.5)*Kz15;

Kzeff15 := 150612;

Kzeff33 := 253629;

soln_z15 := fsolve ({eq15,eq33},{Kvr,Kz15});

## showing X y values next to points on a plot tia sa...

Greetings all

I would like to show the x y values next to the point on the plot does maple have a command to do this?

data := [[0, 0], [.5, -1], [1, 0], [2, 2], [3, 0], [5, -4], [7, 0], [11, 8], [15, 0], [18.5, -7], [22, 0], [24.5, 5], [27, 0]];
with(CurveFitting);
cubfit := BSplineCurve(data, x, order = 3);
plots[display](plot(data, style = point, color = black, symbol = BOX),
plot(cubfit, x = 0 .. 27, thickness = 2))

tia sal

## Printing from Maple...

What is the best way to print a maple file?  It seems that a lot of white space is added when making an html file.  Also it scrambles in a ton of strange symbols when its in a pdf, Im just trying to figure out how to print a 3 or 4 page maple worksheet without it printing on 20 pages!

Thanks!

## Sin inequality plot...

How can I plot sin(y)>0, x>0 ?

I've tried using inequal:
with(plots):
inequal({sin(y)>0,x>0}, x=-2*pi..2pi, y=-2*pi..2*pi);

but I get the message 'unable to compute coeff' .

## Stretching slope fields...

I'm interested in finding a command that could stretch slope fields for me. Or perhaps I need to make a procedure of my own?

If that is the case, I would like to know how to draw a segment of a graph by varying the slope.

I think it is possible for me to use

with(geometry);

segment([y=y'*x+C, [x,y]],a,b);

But I don't have any idea how to make a program out of it yet.

## Step by step integration...

Can I have maple show me the steps it takes to integrate?  Is this possible?

thanks!

## Indexing functions of Arrays with arbitrary (anti...

Maple

Using the procedure `permsPosNeg` as given in the blog entry Positive and negative permutations, including the improvement obtained in the blog entry Refactoring Maple code, consider the following procedure:

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