Hi,
You're using the same [SL_CI,DL_CI] to store both fields, so the last one override the first one.
You should have storing variables incrementing with m like :
for m = 1 : length(parameter)
[SL_CI(m),DL_CI(m)] = Condition_Index (file_list_damage,damageinfo_selected_yr,increment_vector,increment(m),(parameter{m}));%
plot(x,SL_CI);
end
I don't know what if the output type, so you might have to use a cell array, but this is the idea.
You shouldn't have m in the function deifinition
function [SL_CI,DL_CI] = Condition_Index (file_list_damage,damageinfo_selected_yr,increment_vector,increment,parameter)
%%some other calculation steps which gives the input for following function call%%
SL_CI.(parameter) = UK_CI_SL(file_list_damage,damageinfo_selected_yr,DL_CI,ImpFactor); %this calls out a function which returns a double array%%
end
