Geopsy: Waveform Scripting Language

The scripting language is based on the ECMAScript scripting language, as defined in standard ECMA-262. Basic structures, variables,... are described in this document. Other references:

• A quick reference guide
• A more comprehensive tutorial (JavaScript which is also an ECMAScript)

Geopsy provides several additional functions for processing signals details here below

save

Syntax

 save(string tag);

Description

Saves the current signals onto the stack under tag. tag is an arbitrary string used to restore() previously saved signals. This function is systematically produced when using the waveform menu items.

Examples

 filter();
 save("Low pass 10 Hz");
 whiten();
 save("Whiten");
 restore("Low pass 10 Hz");
 clipStddev();

restore

Syntax

 restore(string tag);

Description

Restore signals previously saved onto the stack under tag.

Examples

 see save()

signalCount

Syntax

 integer signalCount();

Description

Returns the number of signals to process.

Examples

Sets the sampling frequency to 100 Hz for all signals

 n=signalCount();
 for(i=0;i<n;i++) {
   setHeader(i, "DeltaT", 0.01);
 }

header

Syntax

 header(number index, string data, [number dataIndex,]);

Description

Returns the value of data from signal having index.

Examples

Removes the first and the last sample of all signals

 n=signalCount();
 for(i=0;i<n;i++) {
   dt=header(i, "DeltaT");
   setHeader(i, "TimePick", 0, header(i, "T0")+dt);
   setHeader(i, "TimePick", 1, header(i, "EndTime")-dt);
 }
 cut("Pick", 0, "Pick", 1);

setHeader

Syntax

 setHeader(number index, string data, [number dataIndex,] value);

Description

set data of signal having index to value. data may have an additional dataIndex for vectorial data (e.g. TimePick).

Examples

See signalCount()