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How can I plot in dB in Matlab?
Decibels are a ratiometric measurement. For power, as shown in your plot, the reference is 1 milliwatt (denoted from the dBm). 0...

約4年前 | 0

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Does this variable exist
For structures, use isfield() clear a a.M = 'hat'; isfield(a,'M') % True isfield(a,'N') % False For array size, use length(...

約4年前 | 0

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Making the if statement in a for loop display only one iteration of the message
Looks like it takes 25 iterations to converge. Are you looking for it to display at the very end a Success/Failure message? The...

約4年前 | 0

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NEED HELP SOLVING "Array indices must be positive integers or logical values"
Does it need to be a one-liner? If you can grab the x,y coordinate, you could clamp your index points to the box bounds using %...

約4年前 | 0

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Change Simulink parameters in Matlab function
Simulink will look for variables in MATLAB's base workspace by default. Since var1 and var2 are defined in the function's worksp...

約4年前 | 0

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Error with an empty array - Subscript indices must either be real positive integers or logicals
You're subscripting a logical IXY, which will only retrieve indices that evaluate to true from HEIGHTS. Is it possible that all ...

約4年前 | 0

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Grabbing Years of table data to Create New Tables
A fast solution might be to use the Timestamp to extract the date for each row and then use the group capabilities of tables. ...

約4年前 | 1

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I need help with step function
Hi Anna, The (unit) step function is basically a function that goes from 0 to 1, generally at time 0, scaled by whatever magnit...

4年以上前 | 0

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Problems With Function Error
Up until recently, MATLAB had a requirement to separate scripts from functions. A file could hold one but not both types. Now, i...

4年以上前 | 0

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Assigning or replacing elements of another array into an array based on indices
Ali, I suggest you use logical indexing for this instead of FIND. It's faster and a little cleaner. Hope this helps! b = [0 ...

4年以上前 | 0

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Error using figure First argument must be a figure object or a positive Integer
Figure is a function. Try: figure(4) This should activate a figure with ID number 4.

4年以上前 | 0

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Run Simulink Model as a Function
Hi Sze, To clarify, you're hoping to run a simulink model from within a call to ODE45? While possible, I'm afraid this is goi...

4年以上前 | 0

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find max value of structure
If I'm understanding correctly, you have a struct array, s, of size 1x30, with a single field (let's call it x). Something like...

4年以上前 | 0

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Word Counting and Indexing
You are given a list of strings, each being a list of words divided by spaces. Break the strings into words, then return a maste...

4年以上前

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Test for balanced parentheses
Given the input inStr, give the boolean output out indicating whether all the parentheses are balanced. Examples: * If ...

4年以上前

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Flip the vector from right to left
Flip the vector from right to left. Examples x=[1:5], then y=[5 4 3 2 1] x=[1 4 6], then y=[6 4 1]; Request not ...

4年以上前

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Create a vector
Create a vector from 0 to n by intervals of 2.

4年以上前

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Whether the input is vector?
Given the input x, return 1 if x is vector or else 0.

4年以上前

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Find max
Find the maximum value of a given vector or matrix.

4年以上前

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Doubling elements in a vector
Given the vector A, return B in which all numbers in A are doubling. So for: A = [ 1 5 8 ] then B = [ 1 1 5 ...

4年以上前

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Derivative from ode45
Generally I send the result of ode45 back through my function as a post-processing step. [t,x] = ode45(@myDerivFcn,tspan,x0) ...

4年以上前 | 0

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How to solve two differential equations simultaneously with one having a matrix form of initial condition?
Hi Adham, Just to be clear, it's an ordinary differential equation, is /? If so, and each matrix term is separable, then you ...

4年以上前 | 0

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Problem with xlim when having date
Hi Behzad, xlim sets the absolute max and min of the graph that you're looking at. To set the interval for grid lines, use the ...

4年以上前 | 2

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Running ode45 from problem statement
Hi Daniel, For your problem, you were very close and had the solutions to each equation worked out correctly. The function sign...

4年以上前 | 1

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please help me, how do I make the code for the equation in the following picture?
You can't code an infinite sum exactly, but fortunately, this one is bounded (x^2 on the denominator and the numerator is bounde...

4年以上前 | 0

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Sort data based on different column
Try using the sortrows command in conjunction with a transpose. Apply it once to exploit column sorts (e.g. Column 1 is Row 1 ab...

4年以上前 | 0

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Mimicking the font that title() uses when calling it with latex interpreter
Try using the Tex interpreter with the \bf switch? title('\bf\nabla TITLE','Interpreter','tex') seems to get the bold you're lo...

4年以上前 | 0

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Renaming a field in a structure array
MATLAB has a <http://www.mathworks.com/help/techdoc/ref/setfield.html setfield> and a <http://www.mathworks.com/help/techdoc/ref...

4年以上前

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Get the length of a given vector
Given a vector x, the output y should equal the length of x.

4年以上前

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Inner product of two vectors
Find the inner product of two vectors.

4年以上前