pub fn eval(input: &str) -> OctaveResults
Expand description
Evaluate lines of Octave code and extract the results.
let res = mocktave::eval("a = 5+2");
assert_eq!(res.get_scalar_named("a").unwrap(), 7_f64);
let res = mocktave::eval("a = ones(2, 2)");
assert_eq!(res.get_matrix_named("a").unwrap(), vec![vec![1.0_f64; 2]; 2]);
let res = mocktave::eval("a = 'asdf'");
assert_eq!(res.get_string_named("a").unwrap(), "asdf");
Examples found in repository?
More examples
examples/top88.rs (line 80)
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83
fn main() {
// This code adapted from here: https://github.com/blademwang11/Topopt/blob/master/top88.m
let script = "
function xPhys = top88(nelx,nely,volfrac,penalMax,rmin)
E0 = 1;
Emin = 1e-9;
nu = 0.3;
penal = 0.96;
A11 = [12 3 -6 -3; 3 12 3 0; -6 3 12 -3; -3 0 -3 12];
A12 = [-6 -3 0 3; -3 -6 -3 -6; 0 -3 -6 3; 3 -6 3 -6];
B11 = [-4 3 -2 9; 3 -4 -9 4; -2 -9 -4 -3; 9 4 -3 -4];
B12 = [ 2 -3 4 -9; -3 2 9 -2; 4 9 2 3; -9 -2 3 2];
KE = 1/(1-nu^2)/24*([A11 A12;A12' A11]+nu*[B11 B12;B12' B11]);
nodenrs = reshape(1:(1+nelx)*(1+nely),1+nely,1+nelx);
edofVec = reshape(2*nodenrs(1:end-1,1:end-1)+1,nelx*nely,1);
edofMat = repmat(edofVec,1,8)+repmat([0 1 2*nely+[2 3 0 1] -2 -1],nelx*nely,1);
iK = reshape(kron(edofMat,ones(8,1))',64*nelx*nely,1);
jK = reshape(kron(edofMat,ones(1,8))',64*nelx*nely,1);
F = sparse(2,1,-1,2*(nely+1)*(nelx+1),1);
U = zeros(2*(nely+1)*(nelx+1),1);
fixeddofs = union([1:2:2*(nely+1)],[2*(nelx+1)*(nely+1)]);
alldofs = [1:2*(nely+1)*(nelx+1)];
freedofs = setdiff(alldofs,fixeddofs);
iH = ones(nelx*nely*(2*(ceil(rmin)-1)+1)^2,1);
jH = ones(size(iH));
sH = zeros(size(iH));
k = 0;
for i1 = 1:nelx
for j1 = 1:nely
e1 = (i1-1)*nely+j1;
for i2 = max(i1-(ceil(rmin)-1),1):min(i1+(ceil(rmin)-1),nelx)
for j2 = max(j1-(ceil(rmin)-1),1):min(j1+(ceil(rmin)-1),nely)
e2 = (i2-1)*nely+j2;
k = k+1;
iH(k) = e1;
jH(k) = e2;
sH(k) = max(0,rmin-sqrt((i1-i2)^2+(j1-j2)^2));
endfor
endfor
endfor
endfor
H = sparse(iH,jH,sH);
Hs = sum(H,2);
x = repmat(volfrac,nely,nelx);
xPhys = x;
loop = 0;
change = 1;
while (change > 0.01)
loop = loop + 1;
penal = min(penalMax, penal + 0.04);
%% FE-ANALYSIS
sK = reshape(KE(:)*(Emin+xPhys(:)'.^penal*(E0-Emin)),64*nelx*nely,1);
K = sparse(iK,jK,sK); K = (K+K')/2;
tic; U(freedofs) = K(freedofs,freedofs)\\F(freedofs); toc;
ce = reshape(sum((U(edofMat)*KE).*U(edofMat),2),nely,nelx);
c = sum(sum((Emin+xPhys.^penal*(E0-Emin)).*ce));
dc = -penal*(E0-Emin)*xPhys.^(penal-1).*ce;
dv = ones(nely,nelx);
dc(:) = H*(dc(:)./Hs);
dv(:) = H*(dv(:)./Hs);
l1 = 0; l2 = 1e9; move = 0.2;
while ((l2-l1)/(l1+l2) > 1e-3)
lmid = 0.5*(l2+l1);
xnew = max(0,max(x-move,min(1,min(x+move,x.*sqrt(-dc./dv/lmid)))));
xPhys(:) = (H*xnew(:))./Hs;
if sum(xPhys(:)) > volfrac*nelx*nely, l1 = lmid; else l2 = lmid; endif
endwhile
change = max(abs(xnew(:)-x(:)));
x = xnew;
endwhile
endfunction
z = top88(30,10,0.5,3,3);
";
let y = mocktave::eval(script);
println!("{y:#?}");
}