How to properly use Symbolic Toolbox to implement superscripts and subscripts on imaginary numbers and theta

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Clayton Allen
Clayton Allen 2024-11-4，14:44
评论： Clayton Allen 2024-11-5，16:06
Greetings community,
I'll begin by saying that I am not an engineer or math expert. This question arose during my independent research to understand kinematics, more specifically complex number addition and vector loops.
Part of this expirement is that I want to learn more about properly using the Symbolic Toolbox to be able to write expressions as seen in this image snippet. However, I am failing to use the superscripts and subscripts properly. Consider the following code snippet:
syms V1 theta_1 i
V1_expr = V1 * exp(theta_1 * 1i)
As the more educated person can see, it will not produce the desired outcome as shown in the image above. It will subscript theta with 1. Instead I have tried to subscript the imaginary number but MatLab gets upset when I do that. What I get as a result that works right now is:
Would anyone be willing to assist me?
Cheers,

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Aneela
Aneela 2024-11-4，16:04
编辑：Aneela 2024-11-4，16:20
Hi @Clayton Allen
The "syms" function in MATLAB's Symbolic Toolbox allows you to create symbolic scalar variables and functions, and matrix variables and functions.
The code below generates desired expression:
syms V1 theta1 i
V1_expr = V1 * exp(i * theta1);
disp(V1_expr);
Please refer to the following MathWorks documentation for more information on "syms": https://www.mathworks.com/help/symbolic/syms.html
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Walter Roberson
Walter Roberson 2024-11-4，23:38
编辑：Walter Roberson 2024-11-4，23:39
In LiveScript, both expressions are the same.
Unfortunately due to a bug in MATLAB Answers, I cannot show you the outputs. (They are there... just not showing up.)
clear i %MATLAB Answers glitch, i initialized as [] sometimes
syms V1 theta_1
V1_expr = V1 * exp(theta_1 * 1i);
disp(V1_expr)
V2_expr = V1 * exp(theta_1 * i);
disp(V2_expr)

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