Graphics

Using Variables in Text Strings

Any string variable is a valid specification for the text String property. For example, each row of the matrix PersonalData contains specific information about a person (note that all but the longest row is padded with a space so that each has the same number of columns).

PersonalData = ['Jack Straw  ';'489 Main St.';'Wichita KN '];

To display the data, index into the desired row.

text(x1,y1,['Name: ',PersonalData(1,:)])
text(x2,y2,['Address: ',PersonalData(2,:)])
text(x3,y3,['City and State: ',PersonalData(3,:)])

You can specify numeric variables in text strings using the num2str (number to string) function. For example, if you type on the command line,

x = 21;
['Today is the ',num2str(x),'st day.']

MATLAB concatenates the three separate strings into one.

Today is the 21st day.

Since the result is a valid string, you can specify it as a value for the text String property.

text(xcoord,ycoord,['Today is the ',num2str(x),'st day.'])

Including Symbols and Greek Letters in Text Strings

Example - Multiline Text