When I replace the lincpace with the regular t1=1:1:10e6; i get the following error:
Unable to perform assignment because the left and right sides have a different number of elements.
Error in sym/privsubsasgn (line 1128)
L_tilde2 = builtin('subsasgn',L_tilde,struct('type','()','subs',{varargin}),R_tilde);
Error in sym/subsasgn (line 965)
C = privsubsasgn(L,R,inds{:});
Error in Langmuir_Q21 (line 44)
pp1(i) = vpa(vpasolve(eq1(i),p1),6);