json - JQuery radio button filters not working -

i doing simple filter using radio buttons, have 3 radio buttons in group. want append different data in unordered list(ul) based on radio button selection.i using 3 buttons filter between veg,non-veg , both(none).the code using

   $(document).ready(function(){    $(".getmenu").click(function(){    $.getjson("data.json",function(result){    $.each(result, function(i, field){     var cat=field.category;     var t=field.type;  //putting case           //radio filter 1     if($('.veg').checked) {     if(t=="veg"){     switch(cat){     case "soups":     $(".soup").append(field.menu_item + "<br />");     break;     case "main course":     $(".main").append(field.menu_item + "<br />");     break;     case "starters":     $(".starter").append(field.menu_item + "<br />");     break;     }     }     }         ////radio filter 2     else if($('.nveg').checked){     if(t=="non-veg"){     switch(cat){     case "soups":     $(".soup").append(field.menu_item + "<br />");     break;     case "main course":     $(".main").append(field.menu_item + "<br />");     break;     case "starters":     $(".starter").append(field.menu_item + "<br />");     break;     }     }     }         //radio filter 3     else {      switch(cat){     case "soups":     $(".soup").append(field.menu_item + "<br />");     break;     case "main course":     $(".main").append(field.menu_item + "<br />");     break;     case "starters":     $(".starter").append(field.menu_item + "<br />");     break;     }     }     } 

and if not putting filter able append data json. file looks this:

   [    {"category":"soups","menu_item":"tomato soup","type":"veg"},    {"category":"starters","menu_item":"summer salad","type":"veg"},    {"category":"main course","menu_item":"black beans chicken","type":"non-veg"},    {"category":"soups","menu_item":"lentil soup","type":"veg"}    ] 

checking of radio inputs should if ($('.veg').is(':checked') {...}