Undefined function "......" for input arguments of type 'double'

Please help me, when I run a code it gives

"Undefined function '.....' for input arguments of type 'double'"

Let me know what to do now ?

[Sad Grad Student]

paste your code here by editing your question.

[Zahid Iqbal Rana]

lb = [-1 0 2 3 -2];

ub = [5 5 3 3 7];

n = 1e7;

X = randFixedLinearCombination(n,12.5,[1 1 1 1 1],lb,ub);

Answer 1

[per isakson]

The cause to this error message may be one of

• typo, you have misspelled the name of the function
• the function cannot be reached because it is not on the search path
• a function with that name exists on the search path, but it is not defined for the actual type of input. E.g.

>> max(cell(1,9))
Undefined function 'max' for input arguments of type 'cell'.

• the function does not exist on your system

Measures

• check spelling
• run the command which function_name -all. If which finds it run help function_name and read carefully
• if you think it is a function, which comes with Matlab, search for the function in the Matlab documentation
• search the file function_name.m with Windows Explorer or similar

Answer 2

[jayamala pakhare]

Undefined function 'rescale' for input arguments of type 'double'.

[Walter Roberson]

rescale() was introduced in R2017b.

[Camille Dingam]

Hello, please help me with the similar error as below:

Undefined function 'mfcc' for input arguments of type 'double'.

[Steven Lord]

The mfcc function was introduced in Audio Toolbox in release R2018a. Do you have this toolbox installed (check the output of the ver function if you're not sure) and are you using release R2018a or later?