You can initialize an array, or leave it uninitialized. When an ARRAY is initialized, you can define the number of elements in each dimension and the contents of each element. An uninitialized array has a dimension but no elements. The below Figure(a) shows an uninitialized TWO-DIMENSIONAL array control with all the elements are dimmed indicating that the array is uninitialized. The below Figure (b) shows initialized array of two rows and two columns.
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Description: Working and manipulating with Arrays is an important part in LabVIEW development. Arrays are very powerful to use in LabVIEW. In all your applications you would probably use both One-Dimensional Arrays and Two-Dimensional Arrays.
On the Front Panel using the CONTROL PALETTE we can create an array as follows (Array, Matrix & Cluster subpalette):
You drag and drop the empty Array on the FRONT PANEL, next you find a Control or Indicator (Numeric, String, Boolean, etc,) and drag it into the empty Array. You can create an Array of (almost) any kind of Control or Indicator.
2D OR MULTIDIMENSIONAL ARRAY? Just drag the mouse in the Index display to the left and increase the dimension.
Use the Array functions to create and manipulate arrays. The most useful Array functions are:All these functions are basic (but very useful) array functions you will probably be using in all your applications and VIs.
Task: Build Array. This function concatenates multiple arrays or appends elements to an n-dimensional array. Try the simple example below. This example using the Build Array function inside a For loop in order build an array with 10 elements.Task: Index Array. This function returns the element or subarray of the n-dimension array at the index. It is always useful to find a specific value in an array. The Index Array is extendible, so you can drag it out to find more than one element. Try the simple example below.
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