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- Orhan Celiker
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- Electrical Engineering and Computer Science
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Introduction to matlab, 6.057 introduction to matlab, homework 1.
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Assigning to Variables and Matrices
Be sure to read the indexing page first.
Assigning a matrix to a variable can be done using the = operator.
To change one entry in a matrix, assign to the indexed value:
If a matrix is not assigned, a sufficiently large matrix is generated.
If a matrix is assigned, but does not contain the element, the matrix is made sufficiently large.
You can assign to a block within a matrix. If the right hand side is a scalar, all values within that block are assigned that value. If the right hand side is a matrix, it must have the same dimensions of the block you are assigning to. The matrix is automatically enlarged if you index outside the matrix.
The colon and end can also be used to denote a row:
Assign a value to a workspace variable
- assignin( ws ,' var ', val )
assignin ( ws ,' var ', val ) assigns the value val to the variable var in the workspace ws . var is created if it doesn't exist. ws can have a value of 'base' or 'caller' to denote the MATLAB base workspace or the workspace of the caller function.
The assignin function is particularly useful for these tasks:
- Exporting data from a function to the MATLAB workspace
- Within a function, changing the value of a variable that is defined in the workspace of the caller function (such as a variable in the function argument list)
The MATLAB base workspace is the workspace that is seen from the MATLAB command line (when not in the debugger). The caller workspace is the workspace of the function that called the M-file. Note the base and caller workspaces are equivalent in the context of an M-file that is invoked from the MATLAB command line.
This example creates a dialog box for the image display function, prompting a user for an image name and a colormap name. The assignin function is used to export the user-entered values to the MATLAB workspace variables imfile and cmap .
- prompt = {'Enter image name:','Enter colormap name:'}; title = 'Image display - assignin example'; lines = 1; def = {'my_image','hsv'}; answer = inputdlg(prompt,title,lines,def); assignin('base','imfile',answer{1}); assignin('base','cmap',answer{2});
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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Class : Error while assigning variables in constructor
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https://matlabcentral.mathworks.com/matlabcentral/answers/1657995-class-error-while-assigning-variables-in-constructor#answer_904240
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Computer Science > Robotics
Title: multi-auv kinematic task assignment based on self-organizing map neural network and dubins path generator.
Abstract: To deal with the task assignment problem of multi-AUV systems under kinematic constraints, which means steering capability constraints for underactuated AUVs or other vehicles likely, an improved task assignment algorithm is proposed combining the Dubins Path algorithm with improved SOM neural network algorithm. At first, the aimed tasks are assigned to the AUVs by improved SOM neural network method based on workload balance and neighborhood function. When there exists kinematic constraints or obstacles which may cause failure of trajectory planning, task re-assignment will be implemented by change the weights of SOM neurals, until the AUVs can have paths to reach all the targets. Then, the Dubins paths are generated in several limited cases. AUV's yaw angle is limited, which result in new assignments to the targets. Computation flow is designed so that the algorithm in MATLAB and Python can realizes the path planning to multiple targets. Finally, simulation results prove that the proposed algorithm can effectively accomplish the task assignment task for multi-AUV system.
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To assign values in the MATLAB base workspace, use 'base'. The base workspace stores variables that you create at the MATLAB command prompt, including any variables that scripts create, assuming that you run the script from the command line or from the Editor. To assign variables in the workspace of the caller function, use 'caller'. The caller ...
To assign values to particular elements, specify indices after the name of the field. You must specify the indices within a cell array. However, specify the new values in an array whose data type matches the data type of the field. S = setfield(S, 'a' ,{3:5},[0 -50 -100]) S = struct with fields:
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.
The syntax c{:} transforms a cell array in a list, and a list is a comma separated values, like in function arguments. Meaning that you can use the c{:} syntax as argument to other functions than deal. To see that, try the following: > z = plus(1,2) z = 3. > c = {1,2}; > z = plus(c{:}); z = 3.
Assign Multiple Variables. Learn more about arrays matrix variables . I have a array for example [1,2,3,4]. I want to assign a variable to each number in the array such that a=1, b=2, c=3, and d=4. ... Find the treasures in MATLAB Central and discover how the community can help you! Start Hunting!
Introduction To MATLAB Programming. Menu. More Info Syllabus The Basics What is Programming? Command Prompt and Expressions Lists, Vectors, and Matrices Variables Root-Finding Warm-up ... assignment_turned_in Programming Assignments with Examples. Download Course.
6.057 Introduction to MATLAB, Homework 1 Download File DOWNLOAD. Course Info Instructor Orhan Celiker; Departments Electrical Engineering and Computer Science ... assignment Programming Assignments. notes Lecture Notes. Download Course. Over 2,500 courses & materials
Assignment: MATLAB Calculation ... Access to lectures and assignments depends on your type of enrollment. If you take a course in audit mode, you will be able to see most course materials for free. To access graded assignments and to earn a Certificate, you will need to purchase the Certificate experience, during or after your audit. ...
You can assign to a block within a matrix. If the right hand side is a scalar, all values within that block are assigned that value. If the right hand side is a matrix, it must have the same dimensions of the block you are assigning to. The matrix is automatically enlarged if you index outside the matrix.
assignin. Assign a value to a workspace variable. Syntax. assignin(ws,'var',val) Description. assignin(ws,'var',val) assigns the value val to the variable var in the workspace ws.var is created if it doesn't exist.ws can have a value of 'base' or 'caller' to denote the MATLAB base workspace or the workspace of the caller function.. The assignin function is particularly useful for these tasks:
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.,
In MATLAB®, you can create tables and assign data to them in several ways. Create a table from input arrays by using the table function. Add variables to an existing table by using dot notation. ... One way to assign or add a row to a table is to assign a cell array to a row. If the cell array is a row vector and its elements match the data ...
Assignment statements. The preceding MATLAB commands that assign the value of the expression after the '=' sign ... 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. Previous.
MATLAB, which was first developed to work with vectors and matrices, interprets cos(pi) as a reference to the πth entry in the vector assigned to the variable cos. Even though 14 is a number, MATLAB interprets it a vector with only one component. Subscripts for a vector can only be positive integers, so MATLAB is complaining that the th
As H.Muster said, deal is the way to go here. The reason for the brackets is that (following H.Muster's setup) a{b} returns a comma-separated list; the brackets need to be placed around this list to concatenate it into a vector. Running help lists in Matlab might further clarify, as might the documentation on comma-separated lists. Edit: The answer provided by user2000747 seems much cleaner ...
Assigning Output from a Comma-Separated List. You can assign any or all consecutive elements of a comma-separated list to variables with a simple assignment statement. Define the cell ... Some common MATLAB operations and indexing techniques do not work directly on comma-separated lists. This section details several errors you can encounter ...
methods. function myobj = ElemWithAxes (fc, ant) % Constructor. % Inputs: fc is the carrier frequency in Hz and ant is. % an antenna compatible with the phased array toolbox. It must. % support the ant.pattern () method. % TODO: Assign fc and ant to the class variables. myobj.fc = fc;
The linear assignment problem is a way of assigning rows to columns such that each row is assigned to a column and the total cost of the assignments is minimized (or maximized). The cost of assigning each row to each column is captured in a cost matrix.The entry Cost(i,j) is the cost of assigning row i to column j.. The cost of unassignment assigns a cost to any row or column that is not matched.
AUV's yaw angle is limited, which result in new assignments to the targets. Computation flow is designed so that the algorithm in MATLAB and Python can realizes the path planning to multiple targets. Finally, simulation results prove that the proposed algorithm can effectively accomplish the task assignment task for multi-AUV system.
23. One line conditional assignment: a(a > 5) = 2; This is an example of logical indexing, a > 5 is a logical (i.e. Boolean or binary) matrix/array the same size as a with a 1 where ever the expression was true. The left side of the above assignment refers to all the positions in a where a>5 has a 1.
From your MATLAB® Grader™ home page, select the course for which you want to create an assignment. Click ADD ASSIGNMENT. Enter assignment details. Title - Enter a title for the assignment. For example, Vector Spaces. Visible - Enter or select the date when you want this assignment to become active and visible to learners.
Unfortunately there are no increment and compound assignment operators in Matlab. I also remember reading posts by employees at Mathworks saying that they don't intend to add such operators to Matlab. Steve Lord's reply to the following question illustrates the difficulties involved (way down, ...