How to round a string

quindarious · Post by **quindarious** » February 24th, 2018, 1:23 am

I'm trying to set up a widget to monitor my Raspberry -Pi running Pi-Hole. It polls a web api for a bunch of measures and returns them as strings.

The problem I have is that one of the strings is usually a decimal with up to 6-8 places.

DNS Queries is a whole number
DNS Queries Blocked is a whole number
Percentage of DNS Queries that were Ads is a decimal with up to 6-8 places

What I want is to either:
1. Round that string down to a single decimal place
or
2. Use the other two measures to calculate the third in the format i want.

Thanks for any advice you can offer!

Cheers

Post by **jsmorley** » February 24th, 2018, 1:41 am

quindarious wrote:I'm trying to set up a widget to monitor my Raspberry -Pi running Pi-Hole. It polls a web api for a bunch of measures and returns them as strings.

The problem I have is that one of the strings is usually a decimal with up to 6-8 places.

DNS Queries is a whole number
DNS Queries Blocked is a whole number
Percentage of DNS Queries that were Ads is a decimal with up to 6-8 places

What I want is to either:
1. Round that string down to a single decimal place
or
2. Use the other two measures to calculate the third in the format i want.

Thanks for any advice you can offer!

Cheers

If the intent is to display the 3rd number in a String meter, it's pretty simple:

Code: Select all

[MeterString]
Meter=String
MeasureName=MeasureReturningThat3rdNumber
NumOfDecimals=1

https://docs.rainmeter.net/manual/meters/string/#NumOfDecimals

quindarious · Post by **quindarious** » February 24th, 2018, 1:56 am

Yep I tried that but had no effect.

this is the code behind it

Code: Select all

[AdsPercentageCount]
Meter=String
MeasureName=AdsPercentage
NumOfDecimals=1
X=208
Y=0r
W=180
H=12
FontSize=#FontSize#
FontColor=#FontColor#
FontFace=#Font#
Padding=5,5,5,5
StringAlign=Right
StringEffect=Shadow
AntiAlias=1

Post by **jsmorley** » February 24th, 2018, 2:06 am

quindarious wrote:Yep I tried that but had no effect.

this is the code behind it

Code: Select all

[AdsPercentageCount]
Meter=String
MeasureName=AdsPercentage
NumOfDecimals=1
X=208
Y=0r
W=180
H=12
FontSize=#FontSize#
FontColor=#FontColor#
FontFace=#Font#
Padding=5,5,5,5
StringAlign=Right
StringEffect=Shadow
AntiAlias=1

Looks to me like the measure [AdsPercentage] is returning a string value that has the "%" sign already on the end of it.

This means it is not a "number", and NumOfDecimals won't respond to it.

To fix this, you will need to get that string into a number. First, use Substitute to strip off the "%" sign, then pass the resulting string through a Calc measure to convert it to a real number.

Code: Select all

[Rainmeter]
Update=1000
DynamicWindowSize=1
AccurateText=1

[AdsPercentage]
Measure=String
String=5.032218%
Substitute="%":""

[AdsPercentageNumber]
Measure=Calc
Formula=[AdsPercentage]
DynamicVariables=1

[AdsPercentageCount]
Meter=String
MeasureName=AdsPercentageNumber
NumOfDecimals=1
X=208
Y=0r
W=180
H=12
FontSize=#FontSize#
FontColor=#FontColor#
FontFace=#Font#
Padding=5,5,5,5
StringAlign=Right
StringEffect=Shadow
AntiAlias=1
Text=%1%

1.png

Note that you can stick the "%" back on with the Text option on the String meter.

quindarious · Post by **quindarious** » February 24th, 2018, 2:15 am

No the number presented by the api doesn't have a percentage sign on the end of it, that gets added afterwards.

This is the output of the api.php webpage

Code: Select all

{"domains_being_blocked":118745,"dns_queries_today":6518,"ads_blocked_today":326,"ads_percentage_today":5.001534,"unique_domains":549,"queries_forwarded":6089,"queries_cached":103,"clients_ever_seen":2,"unique_clients":2,"status":"enabled"}

This is the code for displaying the number i'm having issues with

Code: Select all

[AdsPercentage]
Measure=Plugin
Plugin=WebParser
URL=[PiholeStats]
StringIndex=4

[AdsPercentageLabel]
Meter=String
X=15
Y=2R
W=190
H=12
FontSize=#FontSize#
FontColor=#FontColor#
FontFace=#Font#
Padding=5,5,5,5
StringEffect=Shadow
AntiAlias=1
Text=Percent Of Traffic:

[AdsPercentageCount]
Meter=String
MeasureName=AdsPercentage
NumOfDecimals=1
X=208
Y=0r
W=180
H=12
FontSize=#FontSize#
FontColor=#FontColor#
FontFace=#Font#
Padding=5,5,5,5
StringAlign=Right
StringEffect=Shadow
AntiAlias=1

[AdsPercentageSign]
Meter=String
X=220
Y=0r
W=190
H=12
FontSize=#FontSize#
FontColor=#FontColor#
FontFace=#Font#
SolidColor=0,0,0,1
Padding=5,5,5,5
StringAlign=Right
StringEffect=Shadow
AntiAlias=1
Text=%

Thanks again for all your help I really appreciate it!

Post by **jsmorley** » February 24th, 2018, 2:17 am

Note that this would not be needed if the original measure, presumably a WebParser child measure, returned the string without the "%" on the end of it. Then the measure would have both a string and a number value, and the String measure with NumOfDecimals would handle it properly without the need for the Substitute or the intervening Calc measure.

It might be worth looking at the RegExp on the parent WebParser measure, to see if you can get that string sans the "%" sign. As I noted before, you can tack the "%" back on with the Text option on the String meter.

quindarious · Post by **quindarious** » February 24th, 2018, 2:21 am

Yeah there's no percentage sign on the web page

"ads_percentage_today":5.001534,

so i'm not sure why NumOfDecimals=1 isn't working.

Post by **jsmorley** » February 24th, 2018, 2:21 am

quindarious wrote:No the number presented by the api doesn't have a percentage sign on the end of it, that gets added afterwards.

This is the output of the api.php webpage

Code: Select all

{"domains_being_blocked":118745,"dns_queries_today":6518,"ads_blocked_today":326,"ads_percentage_today":5.001534,"unique_domains":549,"queries_forwarded":6089,"queries_cached":103,"clients_ever_seen":2,"unique_clients":2,"status":"enabled"}

This is the code for displaying the number i'm having issues with

Code: Select all

[AdsPercentage]
Measure=Plugin
Plugin=WebParser
URL=[PiholeStats]
StringIndex=4

[AdsPercentageLabel]
Meter=String
X=15
Y=2R
W=190
H=12
FontSize=#FontSize#
FontColor=#FontColor#
FontFace=#Font#
Padding=5,5,5,5
StringEffect=Shadow
AntiAlias=1
Text=Percent Of Traffic:

[AdsPercentageCount]
Meter=String
MeasureName=AdsPercentage
NumOfDecimals=1
X=208
Y=0r
W=180
H=12
FontSize=#FontSize#
FontColor=#FontColor#
FontFace=#Font#
Padding=5,5,5,5
StringAlign=Right
StringEffect=Shadow
AntiAlias=1

[AdsPercentageSign]
Meter=String
X=220
Y=0r
W=190
H=12
FontSize=#FontSize#
FontColor=#FontColor#
FontFace=#Font#
SolidColor=0,0,0,1
Padding=5,5,5,5
StringAlign=Right
StringEffect=Shadow
AntiAlias=1
Text=%

Thanks again for all your help I really appreciate it!

Well, you can remove the Substitute option then, but still pass the string through that Calc measure to turn it into a real number. I thought WebParser child measure that returned a string that was in fact a "number" could directly be used, but it looks like it can't with MeasureName on a String meter. Only with [MeasureName:] as a section variable, but that won't help in this case, as section variables used in the Text option of a String meter won't obey any of the formatting commands like NumOfDecimals or StringCase and such.

quindarious · Post by **quindarious** » February 24th, 2018, 2:30 am

jsmorley wrote:Well, you can remove the Substitute option then, but still pass the string through that Calc measure to turn it into a real number. I thought WebParser child measure that returned a string that was in fact a "number" could directly be used, but it looks like it can't with MeasureName on a String meter. Only with [MeasureName:] as a section variable, but that won't help in this case, as section variables used in the Text option of a String meter won't obey any of the formatting commands like NumOfDecimals or StringCase and such.

You're a superstar! Altered the code as seen below and got the number displayed exactly like I wanted with one decimal place!

Code: Select all

; Percentage Ads ======================================================================================

[AdsPercentage]
Measure=Plugin
Plugin=WebParser
URL=[PiholeStats]
StringIndex=4

[AdsPercentageLabel]
Meter=String
X=15
Y=2R
W=190
H=12
FontSize=#FontSize#
FontColor=#FontColor#
FontFace=#Font#
Padding=5,5,5,5
StringEffect=Shadow
AntiAlias=1
Text=Percent Of Traffic:

[AdsPercentageNumber]
Measure=Calc
Formula=[AdsPercentage]
DynamicVariables=1

[AdsPercentageCount]
Meter=String
MeasureName=AdsPercentageNumber
NumOfDecimals=1
X=208
Y=0r
W=180
H=12
FontSize=#FontSize#
FontColor=#FontColor#
FontFace=#Font#
Padding=5,5,5,5
StringAlign=Right
StringEffect=Shadow
AntiAlias=1

[AdsPercentageSign]
Meter=String
X=220
Y=0r
W=190
H=12
FontSize=#FontSize#
FontColor=#FontColor#
FontFace=#Font#
SolidColor=0,0,0,1
Padding=5,5,5,5
StringAlign=Right
StringEffect=Shadow
AntiAlias=1
Text=%

Thanks again so much for all your help. Awesome work!

Post by **jsmorley** » February 24th, 2018, 2:31 am

Oh wait... Doh!

You can do it this way:

Code: Select all

[AdsPercentageCount]
Meter=String
X=208
Y=0r
W=180
H=12
FontSize=#FontSize#
FontColor=#FontColor#
FontFace=#Font#
Padding=5,5,5,5
StringAlign=Right
StringEffect=Shadow
AntiAlias=1
Text=[AdsPercentage:1]%
DynamicVariables=1

You can in fact use a [SectionVariable], but need to first tell it that you want the "number value" with a ":" colon, and follow that with the number of decimal places you want.

Just do that in the Text option, and be sure to add DyanmicVariables=1 to the meter. Remove the MeasureName and NumOfDecimals options entirely.

No Calc measure needed...

https://docs.rainmeter.net/manual/variables/section-variables/#Decimals

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