I am trying to get my answer to Display but it wont let me

4 views (last 30 days)
syms f(x)
f(x) = (x^3) - (7*x) + 6;
x=solve(f(x)==0,x);
disp('the roots will be',(x))
says error below-
Incorrect number or types of inputs or outputs for function extractCreationTimeDigits.
Error in sym/disp (line 16)
useDigits = extractCreationTimeDigits(X);
Error in Workshop_5_Excercise_3_Pt_1 (line 4)
disp('the roots will be',(x))
>>

Accepted Answer

Dyuman Joshi
Dyuman Joshi on 12 Dec 2023
The function disp accepts only 1 input argument.
If you want to display the roots and the text in the same line, you will have to create a string before using disp, see this example for reference - https://in.mathworks.com/help/matlab/ref/disp.html#btnoykw-1
If you want to display them seperately, you can call disp() twice like this -
syms f(x)
f(x) = (x^3) - (7*x) + 6;
x=solve(f(x)==0,x)
x = 
disp('the roots will be')
the roots will be
disp(x)

More Answers (5)

Christopher McCausland
Christopher McCausland on 12 Dec 2023
Hi Bastian,
Try replacing
disp('the roots will be',(x))
with
fprintf('the roots will be %d. \n',x)
This should correct the string formating and print as desired.
Christopher

Star Strider
Star Strider on 12 Dec 2023
Another option —
syms f(x)
f(x) = (x^3) - (7*x) + 6;
x=solve(f(x)==0,x);
disp(["the roots will be ",string(x.')])
"the roots will be " "-3" "1" "2"
Note the use of string arrays and the simple transpose, .' operator.
.

Voss
Voss on 12 Dec 2023
syms f(x)
f(x) = (x^3) - (7*x) + 6;
x=solve(f(x)==0,x);
str = sprintf('%s ',x);
str(end) = [];
fprintf('the roots will be [%s]\n',str)
the roots will be [-3 1 2]

Voss
Voss on 12 Dec 2023
syms f(x)
f(x) = (x^3) - (7*x) + 6;
x=solve(f(x)==0,x);
fprintf('the roots will be [%s]\n',strjoin(string(x)))
the roots will be [-3 1 2]

Voss
Voss on 12 Dec 2023
syms f(x)
f(x) = (x^3) - (7*x) + 6;
x=solve(f(x)==0,x);
fprintf('the roots will be [%s]\n',join(string(x)))
the roots will be [-3 1 2]

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