magma_saber said:Homework Statement
I have to make a plot with sin(t) (y values) vs cos(t) (x values). The values of t should be between -pi and pi. I'm supposed to use linspace.
Homework Equations
The Attempt at a Solution
i used these lines:
t=linspace(-pi,pi)
plot(cos(t),sin(t))
when i tried it out, the plot came out like this:
it shouldn't look like this should it? its only showing the plot go from -1 to 1.
In Matlab, variables are declared and initialized by using the equal sign (=) operator. The variable name goes on the left side of the equal sign, and the value or expression to be assigned to the variable goes on the right side. For example, to declare and initialize a variable named "x" with a value of 5, you would write:
x = 5
Note: Matlab is case-sensitive, so "x" and "X" are considered different variables.
To solve a system of equations in Matlab, you can use the "solve" function. The syntax for the function is:
solve(eq1, eq2, eq3, ...)
Where "eq1, eq2, eq3, ..." are the equations in the system. You can also use the "syms" function to declare the variables in the equations as symbolic variables before using the "solve" function. For more complex systems, you can also use the "fsolve" function.
To plot a graph in Matlab, you can use the "plot" function. The syntax for the function is:
plot(x, y)
Where "x" and "y" are the variables or vectors containing the data points to be plotted. You can also customize the graph by adding a title, labels for the axes, and changing the style and color of the plot using additional arguments in the "plot" function.
To read data from a file in Matlab, you can use the "readtable" or "csvread" functions. The "readtable" function is used for reading data from a text or Excel file, while the "csvread" function is used for reading data from a comma-separated values (CSV) file. Both functions return the data as a matrix, which can then be manipulated and used in your code.
To create a loop in Matlab, you can use the "for" or "while" statements. The syntax for a "for" loop is:
for i = start:increment:end
% code to be executed
end
Where "i" is the loop variable, "start" is the initial value of the loop variable, "increment" is the amount by which the loop variable is incremented in each iteration, and "end" is the final value of the loop variable. The syntax for a "while" loop is:
while condition
% code to be executed
end
Where "condition" is a logical expression that is evaluated in each iteration, and the loop continues as long as the condition is true.