Bioinformatics Toolbox™

set (DataMatrix) - Set property of DataMatrix object

Syntax

set(DMObj) set(DMObj, 'PropertyName') DMObj = set(DMObj, 'PropertyName', PropertyValue) DMObj = set(DMObj, 'Property1Name', Property1Value, 'Property2Name', Property2Value, ...)

Arguments

`DMObj`	DataMatrix object, such as created by `DataMatrix` (object constructor).
`PropertyName`	Property name of a DataMatrix object.
`PropertyValue`	Value of the property specified by `PropertyName`.

Description

set(DMObj) displays possible values for all properties that have a fixed set of property values in DMObj, a DataMatrix object.

set(DMObj, 'PropertyName') displays possible values for a specific property that has a fixed set of property values in DMObj, a DataMatrix object.

DMObj = set(DMObj, 'PropertyName', PropertyValue) sets the specified property of DMObj, a DataMatrix object.

DMObj = set(DMObj, 'Property1Name', Property1Value, 'Property2Name', Property2Value, ...) sets the specified properties of DMObj, a DataMatrix object.

Properties of a DataMatrix Object

Property Description

Name

String that describes the DataMatrix object. Default is ''.

RowNames

Empty array or cell array of strings that specifies the names for the rows, typically gene names or probe identifiers. The number of elements in the cell array must equal the number of rows in the matrix. Default is an empty array.

ColNames

Empty array or cell array of strings that specifies the names for the columns, typically sample identifiers. The number of elements in the cell array must equal the number of columns in the matrix.

NRows

Positive number that specifies the number of rows in the matrix.

Note You cannot modify this property directly. You can access it using the get method.

NCols

Positive number that specifies the number of columns in the matrix.

Note You cannot modify this property directly. You can access it using the get method.

NDims

Positive number that specifies the number of dimensions in the matrix.

Note You cannot modify this property directly. You can access it using the get method.

ElementClass

String that specifies the class type, such as single or double.

Note You cannot modify this property directly. You can access it using the get method.

Examples

Load the MAT-file, provided with the Bioinformatics Toolbox software, that contains yeast data. This MAT-file includes three variables: yeastvalues, a matrix of gene expression data, genes, a cell array of GenBank accession numbers for labeling the rows in yeastvalues, and times, a vector of time values for labeling the columns in yeastvalues.
```
load filteredyeastdata
```
Import the microarray object package so that the DataMatrix constructor function will be available.
```
import bioma.data.*
```
Create a DataMatrix object from the gene expression data in the first 30 rows of the yeastvalues matrix.
```
dmo = DataMatrix(yeastvalues(1:30,:));
```

Use the get method to display the properties of the DataMatrix object, dmo.

get(dmo)

           Name: ''
        RowNames: []
        ColNames: []
           NRows: 30
           NCols: 7
           NDims: 2
    ElementClass: 'double'

Notice that the RowNames and ColNames fields are empty.

Use the set method and the genes and times variables to specify row names and column names for the DataMatrix object, dmo.
```
dmo = set(dmo,'RowNames',genes(1:30),'ColNames',times)
```

Use the get method to display the properties of the DataMatrix object, dmo.

get(dmo)

           Name: ''
        RowNames: {30x1 cell}
        ColNames: {'   0'  ' 9.5'  '11.5'  '13.5'  '15.5'  '18.5'  '20.5'}
           NRows: 30
           NCols: 7
           NDims: 2
    ElementClass: 'double'

set (DataMatrix) - Set property of DataMatrix object

Syntax

Arguments

Description

Examples

See Also