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typing of negative numbers

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Andrewdst

Australia
3 Posts

Posted - 10/25/2018 : 11:10:15 PM

Origin Ver. 2016 pro and Service Release 2 Operating System: Win 7

Why does origin not type out a negative number as witnessed below (random value as an example).

peakval= 2.856;
type $(peakval);

peakval= -2.856; ///// negative value
type $(peakval);

peakval= 2.856;
type $(peakval);

peakval= 2.856;
type "$(peakval)";

peakval= -2.856; ///// negative value
type "$(peakval)";

2.856

2.856
2.856
-2.856

Clearly works if we treat the variable like a string. But treating it as a numeric variable, why does it type the value when the numeric variable is a positive value but not when its a negative value?

just wondering

thanks

AmandaLu

439 Posts

Posted - 10/26/2018 : 01:22:08 AM

Hi,

“type” command (and others) looks for the - character as an option switch indicator. If you assign a negative value to the variable “peakval” and try to type command that value, you must protect the - by enclosing the substitution in quotes or parentheses. Please refer to the following document:

https://www.originlab.com/doc/LabTalk/guide/Substitution-Notation#Displaying_Negative_Values

Thanks,
Amanda
OriginLab Technical Service

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