Error : Operands to the || and && operators must be convertible to logical scalar values.

Hi ,

I wrote this function:

function [flag_SO_Sell,flag_SO_Buy,flag_SO_Hold]= SO_Sub_Rule(Sthochestic_Osilator,High_SO,Low_SO)
% function [flag_SO_Sell,flag_SO_Buy]= SO_Sub_Rule(Sthochestic_Osilator,High_SO,Low_SO)
%%SO Rule
% Need to add for loop with index
% Sthochestic_Osilator([1:end],2)=Sthochestic_Osilator([]);
for i=1:length(Sthochestic_Osilator)
    if Sthochestic_Osilator > High_SO
    %    'Sell'
        flag_SO_Sell=-1;
    else if Sthochestic_Osilator < Low_SO
    %         'Buy'
          flag_SO_Buy=1;
        else if (Sthochestic_Osilator > Low_SO) && (Sthochestic_Osilator < High_SO)
             flag_SO_Hold=0  ; 
    % %         disp  ('Hold')
            end
        end
    end
end

with any idea why i got this error from matlab in the command line: Operands to the and && operators must be convertible to logical scalar values.

Error in SO_Sub_Rule (line 13) else if (Sthochestic_Osilator > Low_SO) && (Sthochestic_Osilator < High_SO)

can someone tell what does this error mean?

Answer 1

[Preethi]

hi,

the output of < and > gives a vector since Sthochestic_Osilator is a vector. When using short circuit operators like '&&' the operators should be scalar. Using binary '&' in place of '&&' may help