Hello,
After calculation gammadot that need locate in table_gammadot (I tried "ismember" is no help), so to get table_eta that function table_gammadot.
Do not use interp1!
Thanks for the helpers
function [eta]=Viscosityy(y)L0=128; gammadot= y/(y-L0);table_gammadot=[0.02 0.05 0.09 0.18 0.3 0.5 0.9 1.8 3 5 9 18 30]; %locate in table_gammadot that equal value to gammadot
%table_gammadot=result
%table_eta is function table_gammadot
%for example table_gammadot=0.05 => table_eta=28.73309
table_eta=[62.20241 28.73309 16.96822 9.024566 5.742004 3.634656 2.099485 1.107372 0.703221 0.429745 0.251424 0.134518 0.082058];%eta=table_eta
endend
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