MATLAB® and Its Applications in Engineering: [Based on MATLAB 7.5 (R2007b)] by Raj Kumar Bansal, Ashok Kumar Goel, Manoj Kumar Sharma

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2.8. Assignment Statement

General form of an assignment statement is given as follows:

When an assignment statement is executed, the value of the expression to the right of the equality sign is first computed and the result obtained is assigned to the variable mentioned on the left of the equality sign.

Example 2.5.

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assignment meaning matlab

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MATLAB Short Course

2. Simple Mathematics

Assignment statements.

The preceding MATLAB commands that assign the value of the expression after the ’=’ sign  to the variable before the ’=’ sign are assignment statements. Note that all variables in the expression after the ’=’ sign must have previously been allocated a value, or else an error occurs. For example, enter the following commands:

c=sqrt(a^2+b^2)

You will see the error message ??? Undefined function or variable ’b’ .  Consider the following:

The last line has nothing at all to do with a mathematical equation. It is a MATLAB  assignment statement that calculates x 2 −12 at x = 7 and stores the result in the variable x , thereby over-writing the previous value.

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Introduction to matlab, assignments.

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MATLAB – Variables

Prerequisite: Getting Started with MATLAB

A variable in simple terms is a storage place that has some memory allocated to it. Basically, a variable used to store some form of data. Different types of variables require different amounts of memory and have some specific set of operations that can be applied to them. The Matlab workspace store all the variables that you create or use during a session. 

Creating Variables

To create a variable enter the name of the variable in the command window, followed by an = operator, and then assign it some values .

Example: 

  Output:

assignment meaning matlab

  Note:  

  • If you don’t put ‘;’ after the variable name, Matlab will display its content after hitting enter.
  • If you don’t give any name to your variable by default Matlab name it with an answer.
  • By default, Matlab treats all variables as matrices if you write just 1 it will store it as 1×1 matrix.

To display the content of the Matlab variable you just need to type the name of the variable, and it will show its content on Command-Line:

  Example:

assignment meaning matlab

Multiple Assignments of Variables

We can also define the multiple variables in a single line using “;” operator.

assignment meaning matlab

Who command

Who lists in alphabetical order the names of all variables in the currently active workspace. To use this command variables should be present in the active workspace and memory allocated to each variable is necessary.

assignment meaning matlab

Assigning Vectors to variables

A vector is a one-dimensional array of numbers. Matlab allows you two types of vector: 

  • Column Vector.

Row Vectors are created by enclosing numbers in square brackets separating with either space or comma.

assignment meaning matlab

Column Vectors are created by enclosing numbers in square brackets, separating each number with ;(semicolon).

assignment meaning matlab

Assigning Matrices to variables

A Matrix is a two-dimensional array of numbers. In Matlab, matrices are created by enclosing numbers in a square bracket write each row of numbers with space or comma separate and after each row put a semicolon. The below code will create a 3×3 matrix:

assignment meaning matlab

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What does 'DFA' mean in baseball? It's not an endearing abbreviation.

Albert Pujols . David Ortiz. Alex Rodriguez. Manny Ramirez. Nelson Cruz. Robinson Cano. Justin Upton.

Ortiz is enshrined in the Baseball Hall of Fame. Pujols is a lock for the Hall. Cruz is a future candidate for Cooperstown. And all were former major league All-Stars.

What do they all have in common?

Each of them have been DFA'd during their major league baseball career.

Ultimately, it means the player is cut from a team. It's one of several transactions that can happen to an MLB player. But it's a more common process for players who are in the latter years of their career and in the middle of a contract.

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What does DFA mean in baseball?

Designated for assignment.

It's one of the more unique transaction types in baseball, where unlike being traded, the player is optioned to the minor leagues or simply cut from the roster.

What does being designated for assignment mean?

Teams are allowed to have 40 players on their roster, with 26 of them active on the major league roster. Over the course of the season, teams make roster moves, which sometimes involves cutting a player. In order to take someone off the 40-man roster, they must be designated for assignment.

MLB.com explains the process: "When a player's contract is designated for assignment — often abbreviated "DFA" — that player is immediately removed from his club's 40-man roster. Within seven days of the transaction (had been 10 days under the 2012-16 Collective Bargaining Agreement), the player can either be traded or placed on irrevocable outright waivers."

Can another team claim a DFA'd player?

Yes, any team can pick up a player off waivers. However, if that team claims the player, they would have to add the player to their 40-man roster.

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Unable to perform assignment because the left and right sides have a different number of elements.

Mariusz Szarzynski

Direct link to this question

https://www.mathworks.com/matlabcentral/answers/439046-unable-to-perform-assignment-because-the-left-and-right-sides-have-a-different-number-of-elements

   1 Comment Show -1 older comments Hide -1 older comments

Hector

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Accepted Answer

Steven Lord

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   0 Comments Show -2 older comments Hide -2 older comments

More answers (1).

Ali Syed

https://www.mathworks.com/matlabcentral/answers/439046-unable-to-perform-assignment-because-the-left-and-right-sides-have-a-different-number-of-elements#answer_609958

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Ali Syed

https://www.mathworks.com/matlabcentral/answers/439046-unable-to-perform-assignment-because-the-left-and-right-sides-have-a-different-number-of-elements#comment_1295468

Hezha Sadraddin

https://www.mathworks.com/matlabcentral/answers/439046-unable-to-perform-assignment-because-the-left-and-right-sides-have-a-different-number-of-elements#comment_1906795

https://www.mathworks.com/matlabcentral/answers/439046-unable-to-perform-assignment-because-the-left-and-right-sides-have-a-different-number-of-elements#comment_1906845

Ahmad

https://www.mathworks.com/matlabcentral/answers/439046-unable-to-perform-assignment-because-the-left-and-right-sides-have-a-different-number-of-elements#comment_3055826

Stephen23

https://www.mathworks.com/matlabcentral/answers/439046-unable-to-perform-assignment-because-the-left-and-right-sides-have-a-different-number-of-elements#comment_3056016

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COMMENTS

  1. MATLAB Operators and Special Characters

    Documentation Videos Answers Trial Software Product Updates MATLAB Operators and Special Characters This page contains a comprehensive listing of all MATLAB ® operators, symbols, and special characters. Arithmetic Operators Relational Operators Logical Operators Special Characters String and Character Formatting

  2. Comma-Separated Lists

    You can assign any or all consecutive elements of a comma-separated list to variables with a simple assignment statement. Define the cell array C and assign the first row to variables c1 through c6. C = cell (4,6); for k = 1:24 C {k} = k*2; end [c1,c2,c3,c4,c5,c6] = C {1,1:6}; c5 c5 = 34

  3. Assignment vs Equality

    Matlab allows a variable to be assigned to a single scalar value, or an array of values. You will learn more about arrays in later lessons. The = sign is the assignment operator in Matlab. It is used to assign values to variable names. It is not used to represent an equation.

  4. Assign value to variable in specified workspace

    The assignin function exports the values to the MATLAB workspace variables name and age2050. function mydialog prompt = { 'Enter name:', 'Enter birth year:' }; answer = inputdlg (prompt); n = answer {1}; birthyear = str2double (answer {2}); a = 2050-birthyear; assignin ( 'base', 'name' ,n); assignin ( 'base', 'age2050' ,a); end

  5. 2.1 Variable assignment in MATLAB

    This video explains the definition of variable assignment in MATLAB and what is the rules to name a variable in MATLAB. In addition, How to defined multiple ...

  6. How do I do multiple assignment in MATLAB?

    How do I do multiple assignment in MATLAB? Ask Question Asked 13 years, 11 months ago Modified 7 years, 9 months ago Viewed 48k times 48 Here's an example of what I'm looking for: >> foo = [88, 12]; >> [x, y] = foo; I'd expect something like this afterwards: >> x x = 88 >> y y = 12 But instead I get errors like: ???

  7. PDF INTRODUCTION TO MATLAB FOR ENGINEERING STUDENTS

    Furthermore, MATLAB is a modern programming language environment: it has sophisticated data structures, contains built-ineditingand debugging tools, andsupports object-oriented programming. Thesefactors make MATLAB an excellent tool for teaching and research. MATLAB has many advantages compared to conventional computer languages (e.g.,

  8. Assignment Statement

    2.8. Assignment Statement General form of an assignment statement is given as follows: variable_name = expression; When an assignment statement is executed, the value of the expression to the right … - Selection from MATLAB® and Its Applications in Engineering: [Based on MATLAB 7.5 (R2007b)] [Book]

  9. MATLAB: Assignment statements

    Assignment statements The preceding MATLAB commands that assign the value of the expression after the '=' sign to the variable before the '=' sign are assignment statements. Note that all variables in the expression after the '=' sign must have previously been allocated a value, or else an error occurs. For example, enter the following commands:

  10. Matlab Introduction-Definition of variables-Assignment ...

    In this video, we will talk more about the definition of variables, the assignment operator, the constants predefined in Matlab library and we will solve the...

  11. Introduction to Programming with MATLAB

    Assignment: MATLAB Calculation ... Sometimes, it was hard to understand meaning of tasks, but in general, it was good experience for me. Thank you! D. DA. 5. Reviewed on Feb 24, 2021. great source for learning something new and full of fun things. I just fall in love with this course and MATLAB programming. Although it is a bit tricky, it is ...

  12. Create and Edit Variables

    If you do not explicitly assign the output of a statement to a variable, MATLAB generally assigns the result to the reserved word ans. The value of ans changes with every statement that returns an output value that is not assigned to a variable. For example, sin (1) ans = 0.8415

  13. Variables

    If one then types "x" in an expression, MATLAB® will use the value stored in "x", i.e., "1". Similarly one can define variables to hold anything that MATLAB can calculate. You can easily overwrite a variable with a new assignment: x=2 now the variable x "contains" the value "2". One can use x as part of an expression: x^2+x ...

  14. Create Assignments

    Answers Create Assignments After you create a course, you're ready to start creating assignments. An assignment groups a set of related problems together. An assignment becomes visible automatically after you add at least one problem and the specified start date occurs.

  15. Assignments

    Assignments Descriptions Additional Files Homework 1: Matrices and Vectors (PDF - 1.2MB) This homework is designed to teach you to think in terms of matrices and vectors because this is how MATLAB organizes data.

  16. What is the equivalent to += in Matlab?

    a([1 1 1]) is unambiguous: it's numeric indexes, because the literal "1" is a double in Matlab, and Matlab won't convert to logicals in the index context.a([true true true]) would be logical indexes. That aside, Ben Voigt's comment makes total sense: += is a simple syntactic shorthand. Steven Lord's post doesn't really explain it; the weird edge cases Lord cites already occur in Matlab with ...

  17. MATLAB

    A variable in simple terms is a storage place that has some memory allocated to it. Basically, a variable used to store some form of data. Different types of variables require different amounts of memory and have some specific set of operations that can be applied to them. The Matlab workspace store all the variables that you create or use ...

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  19. Vector creation, array subscripting, and for-loop iteration

    Description The colon is one of the most useful operators in MATLAB ® . It can create vectors, subscript arrays, and specify for iterations. example x = j:k creates a unit-spaced vector x with elements [j,j+1,j+2,...,j+m] where m = fix (k-j). If j and k are both integers, then this is simply [j,j+1,...,k]. example

  20. What does the MATLAB error "scalar structure required for this

    1 Answer Sorted by: 2 You are creating a 1x5 struct array. To quote the struct documentation: If value is a cell array, then s is a structure array with the same dimensions as value. Each element of s contains the corresponding element of value.

  21. What is 'DFA' in baseball? What to know about abbreviation's meaning

    Albert Pujols. David Ortiz. Alex Rodriguez. Manny Ramirez. Nelson Cruz. Robinson Cano. Justin Upton. Ortiz is enshrined in the Baseball Hall of Fame. Pujols is a lock for the Hall. Cruz is a ...

  22. Unable to perform assignment because the left and right ...

    I'm encountering the same problem in line 12 of my code where I'm trying to plot a piecewise continuous graph in its discrete time form. I'm new to Matlab and I'm trying to learn, any help would be greatly appreciated as I honestly don't know what's wrong or how to solve it. I also have the question which I can add as well if it helps.

  23. matlab

    -1 When I am trying to execute this code, I get an 'Unable to perform assignment because the left and right sides have a different number of elements.' error. Where is the problem? Thanks for helping. A = 1250; Q = 450; t = (0:0.5:10); y (1) = 0; for i = 1:length (t) y (i+1) = y (i) + [ (3* (Q/A).*sind (t).^2)- (Q/A)].*0.5; end display (y); matlab