Query_Lang-PCBFunctions_Parameters_StrToNumberStrToNumber_AD

This document is no longer available beyond version 21. Information can now be found here: StrToNumber for version 24

Parent page: PCB Query Functions - Parameters

Summary

Converts the nominated Parameter Value string to a number, using the stipulated unit type.

Syntax

StrToNumber(Value : String , Unit : String) : Number

Example Usage

StrToNumber(ParameterValue('VoltageRating'),V)  >  50
Converts the Value string returned by the VoltageRating Parameter to a number, using Voltage (V) as the unit, then returns all objects with a Value greater than 50V.

StrToNumber(ParameterValue('Resistance'),Ohms) Between 1000 And 10000
Converts the Value string returned by the Resistance Parameter to a number, using Ohms as the unit, then returns all objects with a Value between 1kΩ and 10kΩ.

StrToNumber(ParameterValue('CapacitanceValue'),F) < 2e-9
Converts the Value string returned by the CapacitanceValue Parameter to a number, using Capacitance (F) as the unit, then returns all objects with a Value less than 2nF (2e-9 in scientific notation).

TIPS

A scripting error will be thrown if the Value string cannot be converted to a number. To allow for this situation, use the StrToNumberDef function, which returns a nominated default number if the conversion fails.

The unit-aware string-to-number converter function accepts a large range of Unit type definitions, including:

  • V – Voltage
  • A – Current
  • Ohm – Resistance
  • Z – Impedance
  • F – Capacitance
  • H – Inductance
  • G – Conductance
  • W – Power
  • Hz – Frequency
  • Q – Charge
  • C – Temperature
  • dB – Decibels
  • % – Percent
  • m – Length
  • Kg – Mass
  • s – Time

The converter accepts standard value scaling factors (micro, kilo, mega etc) and therefore Parameter strings containing prefix abbreviations such as mV, uA, kHz etc.

Several value constructs are also supported. For example, the same resistance value can be represented as:

  • 2k2
  • 2.2k
  • 2200
  • 2,200
If you find an issue, select the text/image and pressCtrl + Enterto send us your feedback.

软件的功能取决于您购买的Altium产品级别。您可以比较Altium Designer软件订阅的各个级别中包含的功能,以及通过Altium 365平台提供的应用程序所能实现的功能。

如果您在软件中找不到某个讨论过的功能,请联系Altium销售团队以获取更多信息。