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permanoon123

Mr. Erfan Permanoon

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3 years, 126 days

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These are replies submitted by permanoon123

@mmcdara 

could you help me please, I want polynomial regression degree 2 for my data!

such as this one in surfer software:

my data:

x y z
146 146 207
143 143 205
55 55 140
65 65 148
733 275 632
379 379 379
186 153 418
48 31 88
753 753 655
33 33 124
90 54 66

@mmcdara 

Do you want to build a linear model which relates the "Thoracic IDEM" to "First" and "Min"? 

yes, sure and just I want to draw a regression in a 3d plot

@Kitonum

restart

with(plottools):

with(plots):

with(CurveFitting):

with(Statistics):

Digits := 10:

``

L := point([146, 146, 207], color = red, symbol = cross, symbolsize = 50), point([143, 143, 205], color = red, symbol = cross, symbolsize = 50), point([55, 55, 140], color = red, symbol = cross, symbolsize = 50), point([65, 65, 148], color = red, symbol = cross, symbolsize = 50), point([733, 275, 632], color = red, symbol = cross, symbolsize = 50), point([379, 379, 379], color = red, symbol = cross, symbolsize = 50), point([186, 153, 418], color = red, symbol = cross, symbolsize = 50), point([48, 31, 88], color = red, symbol = cross, symbolsize = 50), point([753, 753, 655], color = red, symbol = cross, symbolsize = 50), point([33, 33, 124], color = red, symbol = cross, symbolsize = 50), point([90, 54, 66], color = red, symbol = cross, symbolsize = 50):

display(L, axes = boxed, view = [-800 .. 800, -800 .. 800, -800 .. 800], orientation = [125, 65], title = `Thoracic IDEM`, labels = [First, Min, Predicted], labelfont = ["HELVETICA", 20], titlefont = ["ROMAN", 30])

 

NULL

NULL

 

Download H.M.mw

@tomleslie 

why uu14000 answer to me this form?
but in uu5000, not this problem
why my code can not compute uu14000?

qu.mw

@tomleslie 

Thanks for help me.

@acer 

I want to append to the same Excel file

@acer 

thanks for attention

I want output of for(do) rule in excel file

@Carl Love 

Can you help me again? please

the code with exponential function work but piecewise function spend very time and don't give me plot!
 

My pc:

processer: core i7, 3.5GHz

RAM:32GB 

NULLrestart

Digits := 10:

with(plots):

with(CurveFitting):

with(plottools):

v := .7:

Disp := 20:

esp := 1000000:

k := 0:

E := proc (x, t) options operator, arrow; int(exp((-esp*w^4+Disp*w^2+k)*t)*cos(w*(x+v*t))/Pi, w = 0. .. infinity) end proc;

proc (x, t) options operator, arrow; int(exp((-esp*w^4+Disp*w^2+k)*t)*cos(w*(x+v*t))/Pi, w = 0. .. infinity) end proc

(1)

f := proc (x) options operator, arrow; piecewise(0 < x and x < 10000, (1/1000)*x, 10000 < x and x < 20000, -(1/1000)*x+20) end proc:

plot(f(x), x = 0 .. 20000)

 

NULL

u := proc (x, t) options operator, arrow; int(E(x-xi, t)*f(xi), xi = 0. .. 20000) end proc;

proc (x, t) options operator, arrow; int(E(x-xi, t)*f(xi), xi = 0. .. 20000) end proc

(2)

u := proc (x, t) options operator, arrow; evalf(Int(E(x-xi, t)*f(xi), xi = 0 .. 20000, method = _NCrule, epsilon = 1/100000)) end proc

proc (x, t) options operator, arrow; evalf(Int(E(x-xi, t)*f(xi), xi = 0 .. 20000, method = _NCrule, epsilon = 1/100000)) end proc

(3)

plot(u(0, t), t = 0 .. 60000, numpoints = 10)

 

 

NULL

 

NULL

NULL

``


 

Download analyze_of_epsilon_with_x^2.mw

@dharr 

I think the problem is with piecewise function because there is no problem when the function hasn't any piecewise

@Carl Love 

could you please help me to fix my code? I try but my code has a bad answer(look my plot) & I really need that


Integral.mw

@acer 

would you help me to plot u(x,t) in x=0 & all time,please

thanks

@Carl Love 

Thanks,would you please send me the cods

@Carl Love 

Thanks

@Carl Love 

I want A1 start at the end(t=20000), this means the time of graph A1 reduction such as t0=20000 and then t1=19000,...

@acer 

how to write Double Integrals in maple with ApproximateInt rule?

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