topic Setting a traffic light based on text in a record in QlikView

Setting a traffic light based on text in a record

Tue, 30 Mar 2010 17:36:03 GMT

Hello All,

I am trying to set a traffic light based on a value of a particular field. The field is a status field. It has 3 possible values. I would like the traffic light displayed green, yellow or red depending on the value of the field (text value). I have searched the forums and tried over and over to get this to work.

Can someone please explain something from begining to end. I'm assuming I must use a table chart. I tried this and couldn't get it to work. It's basically a report that's displayed and I want the last column to display a traffic light based on one of the fields value (remember it's a text value like ONTIME, LATE and NOTDELIVERED). ONTIME = green, LATE = red and NOTDELIVERED = yellow (all traffic lights.

Please help!

Setting a traffic light based on text in a record

Tue, 30 Mar 2010 18:03:48 GMT

You can do this several ways including changing texts and background colours but I think what you are after are the bundled images that mimic traffic lights.

Yes you need a chart of some sort (pivot or table) then create an expression like this :

if (fieldname='good', 'qmem://<bundled>/BuiltIn/led_g.png', if (fieldname='notsogood', 'qmem://<bundled>/BuiltIn/led_o.png', 'qmem://<bundled>/BuiltIn/led_o.png'))

This represents a compound conditional statement like this:

if fieldname = 'good' then

show green traffic light

else if fieldname = 'notsogood'

show orange traffic light

else

show red traffic light

Remember to change the 'display options' under the expressions tab on the'chart properties' to representation = 'image'.

Hope that helps,

Gordon

Setting a traffic light based on text in a record

johnw — Tue, 30 Mar 2010 19:38:43 GMT

I'd probably make your status field a dual() field:

dual(Status,match(Status,'ONTIME','NOTDELIVERED','LATE')) as Status

While you will still normally see Status as text, it then also has an underlying value of 1, 2 or 3. That allows you to set up a traffic light for the field just like you would for any other numeric field.

Setting a traffic light based on text in a record

Tue, 30 Mar 2010 20:30:23 GMT

Hi John, I used the function you mentioned and for the first time got past 'Error in expression' message. Now, where do I put the Ontime = 1 and green traffic light, notdelivered = 2 and yellow traffic light and late= 3 red traffic light?

I put in Representaiton - Traffic Light Guage. Then go into Guage settings and don't know what to put here.

Can you please help? I've been on this all day.

Thank you!

Setting a traffic light based on text in a record

johnw — Tue, 30 Mar 2010 20:40:41 GMT

See attached example. Basically, you put in the 1, 2 and 3 as the segment boundaries, and set the color for each segment appropriately.

Re: Setting a traffic light based on text in a record

Tue, 08 Oct 2013 13:28:48 GMT

Thanks John. That's just what I needed. Regards.