angularjs - use of operators( >,<,==,!=) in ng-class -


i want use operators check if value greater or equal other number or variable in ng-class, , apply style class accordingly. want color div based on prob.

is usage of ng-class correct? prints value of

{{1-apstats.premappedprobability.tofixed(3)}}

but ng-class tag doesn't work. reasons?

 <div ng-class="(1-apstats.premappedprobability.tofixed(3) >=0.5) ? 'yellowclass':'redclass'"> {{1-apstats.premappedprobability.tofixed(3)}} </div>

what doing wrong.? thank you

@subhash

in ng-class directive, first need give class name condition following -

ng-class="{morebtngray : condition}"

in case - should use 2 ng-class , maintain condition accordingly. 

 <div ng-class="{yellowclass: condition1, redclass:condition2}">{{1-prob.p}} </div>

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