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1;
function I = ip (vgk, vpk)
mu=103.2
kx=1.26
kg1=446.0
kp=3.4
kvb=300.0
e1=vpk .* log(1. + exp(kp .* (1.0/mu + vgk ./ (kvb + vpk .* vpk) .^ 0.5))) / kp
if e1 < 0
I = 0
return
endif
I = double((e1 .^ kx)/kg1)
endfunction
gridsizeg = 2001
gridsizep = 2001
vgk = linspace(-20, 20, gridsizeg)
vpk = linspace(0, 500, gridsizep)
[vg, vp] = ndgrid(double(vgk), double(vpk))
cur = 1e+6*ip(double(vg), double(vp))
surf(vg,vp,cur)
more off
for i=1:gridsizeg
for j=1:gridsizep
fprintf("%f,\n", cur(i,j))
endfor
endfor
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