Matlab to Scilab conversion
Lester Anderson
lester at arctica1.wanadoo.co.uk
Wed Sep 2 19:30:37 CEST 2009
Hello
I am fairly new to using Scilab (and Matlab) but need to convert some existing files. I have attached an example which I can't get to work and the image of the correct plot from Matlab.
Original Matlab file:
rho_m=3300; % in kg/m^3
rho_infill=2700; % in kg/m^3
E=1e11; % in kg/m/s^2
v=0.25;
g=9.81; % in m/s^2
l1=1e3:2e3:50e3; % in m
l2=75e3:25e3:1000e3; % in m
l=[l1 l2]; % in m
k=1./l; % in 1/m
for Te=0:10e3:100e3 % in m
D=E*Te^3/(12*(1-v^2));
phi=1./((D.*k.^4./((rho_m-rho_infill)*g))+1);
semilogx(k,phi)
hold on
title('\Phi _e(k) for various T_e')
xlabel('Wavenumber k')
ylabel('\Phi _e(k)')
end
text(1.7e-6,0.5,'T_e=100km')
text(3.6e-5,0.5,'T_e=10km')
text(8e-5,0.95,'T_e=0km')
Output from the conversion below:
// Display mode
mode(0);
// Display warning for floating point exception
ieee(1);
rho_m = 3300;
// in kg/m^3
rho_infill = 2700;
// in kg/m^3
E = 100000000000;
// in kg/m/s^2
v = 0.25;
g = 9.81;
// in m/s^2
l1 = 1000:2000:50000;
// in m
l2 = 75000:25000:1000000;
// in m
l = [l1,l2];
// in m
k = 1 ./l;
// in 1/m
for Te = 0:10000:100000
// in m
D = (E*(Te^3))/(12*(1-v^2));
phi = 1 ./((D .*(k .^4)) ./((rho_m-rho_infill)*g)+1);
// !! L.14: Matlab function semilogx not yet converted, original calling sequence used.
semilogx(k,phi)
set(gca(),"auto_clear","off")
title("\Phi _e(k) for various T_e")
xlabel("Wavenumber k")
ylabel("\Phi _e(k)")
end;
// !! L.20: Matlab function text not yet converted, original calling sequence used.
text(0.0000017,0.5,"T_e=100km")
// !! L.21: Matlab function text not yet converted, original calling sequence used.
text(0.000036,0.5,"T_e=10km")
// !! L.22: Matlab function text not yet converted, original calling sequence used.
text(0.00008,0.95,"T_e=0km")
Hopefully someone can see what is needed to get things working. Thanks in advance all.
Lester Anderson
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