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I am trying to categorize a field without any success

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The values should be symbolized from 1-5 and yet, I just get that blank symbol. at first I thought that the problem is that the column is defined as string, so I created a new number column and after updating to the original, I got an NULL column. Iv'e created another string column and again I got a blank column . A weird thing is that in the field calculators output preview, the original value appears as it should

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I'm using QGIS 3.4.7 and I have the same issue in other versions as well

here's the way it looks in the field calculator

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    Did you click 'classify' in the symbology window?
    – vagvaf
    Commented Aug 3, 2019 at 10:50
  • @vagvaf Yes I did
    – tristramit
    Commented Aug 3, 2019 at 10:57
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    Can you classify with any other attribute? Is this a shapefile or some other data source?
    – vagvaf
    Commented Aug 3, 2019 at 11:02

2 Answers 2

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Well, it seems like it cannot get the Values in Version 3.4.7 but I can get them in version 2.18.17 so, for now I guess I'll stick to that. I'm using field caculator as shown enter image description here

I must say that it's a partial answer so if anyone has a better, I would be glad to hear it

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    Do you have two fields with the same name? I can see two fields that start with the word "switch," and the end of both is cut off.
    – csk
    Commented Aug 4, 2019 at 18:53
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If you want to convert a String to an Integer you can't just copy it (as you see it just can't be done). You want to use the function to_int(switchboar) to make the conversion for you.

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  • Yeah, well I tried it and it also didn't work, I just keep on getting to NULL values. I just think that the fact that it's a string is not the main issue here
    – tristramit
    Commented Aug 3, 2019 at 9:42

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