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The creation of this content was supported in some part by NSF grant 0538934.

To create an array in G, right click on the Front Panel window and select Array from the Controls>>Modern>>Arrays, Matrix&Cluster menu, and drop the array structure onto the Front Panel window to create an array.

An array structure. The top level listing of the array is labeled Modern and underneath that level is Array, Matrix & Cluster. This level is identified by two icons in a gray shaded rectangle. The icon on the left is labeled Array and the icon on the right is labeled Cluster.
Array Structure

The array structure consists of an index or element offset (highlighted left portion of the array structure) and the array elements (right portion of the structure). When the array structure is placed on the Front Panel window, the data type of the array is undefined as indicated by the grayed out portion of the array.

A screen capture showing up and down arrow buttons to the left of field containing the number 0. The arrow buttons and the field containing the number 1 are contained within a red square box labeled index. These elements are the upper left of a square labeled Elements.
Index and Elements of an Array

To define the array data type, drag and drop any data type, such as numeric, Boolean, string or cluster structure, onto the elements portion of the array structure.

An array field screen capture.
Creating Arrays

At this point, the newly defined array is an Empty or Null Array because no elements of the array have been defined. This is indicated by the grayed out data type within the elements array structure.

A form labeled 'Array' with two fields. each field contains the value '0'.
Empty Arrays

To define elements of an input array, select the element’s index and enter the appropriate value. [link] defines a numeric array with one element at index 0.

A form labeled 'Array' with two fields. The left field contains the value '0' and the right field contains '1.2345'.
Defining Array Elements

G arrays are zero-based. The last element index of an N element array is N-1 . [link] and [link] are those of a 10 element array.

A form labeled 'Array' with two fields. The left field contains the value '9' and the right field contains '9.1011'.
Last Array Element
A form labeled 'Array' with two fields. The left field contains the value '10' and the right field contains '0'.
Undefined Nth Element

An output array is created similarly to an input array with the exception that an output data type needs to be dropped into the array structure.

A form with two sets of two fields. The left form is labeled 'Numeric Input Array' with the values '0' and '0'. The right form is labeled 'Numeric Output Array' with both values being '0'.
Input and Output Arrays

Multidimensional arrays

To create multidimensional arrays, click on the array’s index and select Add Dimension from the menu.

[link] shows a 2-dimensional array.

An array form overlaid with a menu. The item 'Add Dimension' is highlighted in blue.
Creating Multidimensional Arrays
An array form with three fields. The values are '9', '9.1' and '1'.
Multidimensional Array

Array operators

A 4x7 table of icons contained under the direcotry levels 'Programming' and 'Array'.
Array Operators


Clusters allow users to create compound data types by aggregating various and different data types into a single unit.

An empty cluster field.
Empty Cluster

Select the various data types and drag them onto the cluster structure. [link] shows an Error Cluster consisting of a Boolean Error , a numeric ID and a string Message data types.

An error cluster field with a green circle labeled 'Error'  and a field labeled 'ID' containing '2', and the last field is labeled 'Message' with the value 'Out of range'.
Cluster Example

Cluster operators

A 3x6 table of icons contained within the directory levels 'Programming'  and  'Cluster, Class, and Variant'.
Cluster Operators

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
yes that's correct
I think
Nasa has use it in the 60's, copper as water purification in the moon travel.
nanocopper obvius
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
how nano science is used for hydrophobicity
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
what is differents between GO and RGO?
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
analytical skills graphene is prepared to kill any type viruses .
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
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Source:  OpenStax, Introduction to g programming. OpenStax CNX. Mar 15, 2010 Download for free at http://cnx.org/content/col11192/1.1
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