How create string like this: word+number+word with number=num2str(x)

Hi everyone,

how could I write a string like the following word+number+word with number=num2str(x). For example:

x=2; x_str=num2str(x); y='I have' x_str 'dogs'

Thank you for your help.

Answer 1

[Santhana Raj]

x=2; 
y= ['I have' num2str(x) 'dogs'];

[Gennaro Arguzzi]

Hi @Santhana Raj, the definition of the string array y is not possible in Matlab 2015?

[Walter Roberson]

The code here should work in R2015* other than the fact that you probably want to add some blanks,

y= ['I have ' num2str(x) ' dogs'];

In R2016b, MATLAB introduced a new string datatype; as of R2017a that allows for syntax such as

"I have " + 2 +" dogs"

but that was not possible in R2015*

[Steven Lord]

String arrays were introduced in release R2016b. In releases R2015a or R2015b, you will need to make a char array (like Santhana Raj did.)

[Gennaro Arguzzi]

Hi @Steven Lord, the statement sprintf() creates only character vector?

[Steven Lord]

If you're using a release that includes the string data type and you specify the formatSpec input to sprintf as a string rather than a char vector, you will receive a string rather than a char vector as output.

A = sprintf(string('abc %d def'), 17);
B = sprintf("abc %d def", 17); % release R2017a and later

[Walter Roberson]

Right, sprintf() outputs a character vector.

Answer 2

[Walter Roberson]

   y = sprintf('I have %d dogs', x);

[Gennaro Arguzzi]

Hi @Walter Roberson, y is a character vector (e.g. y=sprintf(2222) has 1x4 dimensions). My goal is to obtain a string.

[Walter Roberson]

MATLAB does not have a string data type before R2016b, on character vectors. It is common to put character vectors inside cell arrays, such as

{sprintf('I have %d dogs', x), 'I have no cats', sprintf('I have %d iguanas', y) }