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My own (x,y) - data |
Specify the number of your data points: 4<=n<=200
n =
Specify the order of the polynomial pieces: 1 <= order <= 5 and < n !
order =
Specify the bound for the sum of squares of deviations
sqsum =
Type here your (x,y) -data, each point on a new line, the two numbers separated by blank or comma,
no parentheses
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Synthetic data |
Choose a function
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f(x) = x2/3
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f(x) = 1/(1+25x2)
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f(x) = sin(2*pi*x)
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f(x) = tanh(x)
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f(x) = exp(x)
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a function defined by yourself:
Please type the evaluation program of your function here
using FORTRAN rules.
Your final statement must be
fu= some expression you computed before or just here depending on x
You may use the constants pi, e(=exp(1)), sqrt2(=1.414...),
the integer variables i,j,k, the logicals bool1,bool2,bool3
and the double precision variables sum,h1,h2,h3,h4,y(100),z(100),a(100,100)
which are all intialized with zero resp. .false. .
The routine has the parameters x
(double, input) and fu (double out). never change x!.
first is a local integer and set 0 before calling the function the
first time.
You may use this in order to initialize some local data and set it 1
afterwards to avoid multiple such initialization. Your settings of the local
variables are preserved during program execution.
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Specify the number of data points which will be generated
n =
Important: 4 <= n <= 200 and n > order !
Specify the order of the polynomials pieces in {1,..,5}
order =
Specify the interval from where the x-data should be taken:
Specify the error level for generating the random errors:
Level=
Important: must be in [0,1] !
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