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How to check if the symbolic function yields real value?
Hi, i suggest to have a look at the isequal function. This appears to be what you want to do. Best regards Stephan

約7年前 | 0

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Draw candlestick chart by reading the data in excel file.
Hi, you can use the following code: Data = readtable('DAT_MT_EURAUD_M1_2018.csv'); Data = mergevars(Data,[1 2]); Data.Var1 =...

約7年前 | 0

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Solution of Non linear Equation
Hi, you convert symbolic solutions to double data type. This increases calculation speed, but costs accuracy. Try: % NonLinea...

約7年前 | 0

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how to solve system of nonlinear equation
Hi, vpasolve finds 3 solutions: syms Ns0 Nt0 k_rs = 3.2e7; k_ISC = 3.1e7; k_RISC = 5.6e3; k_ST = 2e-10; k_TT = 5e-15; ...

約7年前 | 0

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Represent parameters as other parameters
Hi, you can use isolate function: syms t1 t2 d3 h1 h2 x y z eq1 = -cos(t1)*(h2 - d3*cos(t2)) == x; eq2 = h1 + d3*sin(t2) == ...

約7年前 | 0

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Im trying to plot an isotherm using the rosenthal equations, but when I run this script I get an 'Index exceeds array bounds' error.
Hi, you have 2 similar errors in your code. Matlab interprets: R(T-T0) as the (T-T0)'th element of an array called R. I suspe...

約7年前 | 0

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6 set of equations, 6 unknowns, empty matrix error.
Hi which release do you use? The following code sets the 6 equations == 0 and produces a result on R2018b: MAx = -0.2376; MAy...

約7年前 | 1

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How to make a for loop to select x number of column in a table. (WITHOUT having the same number multiple time)
Hi, are you sure about having all possible combinations of 5 from 48? There are 1.712.304 possible combinations. You will find ...

約7年前 | 0

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use for loop to write a sum function to achieve halfsum
Hi, note the triu function: A = [1 2 3; 4 5 6; 7 8 9] result = sum(triu(A),'all') Best regards Stephan

約7年前 | 0

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Example from webinar: Quadcopter Modelling and Simulation: A Case Study for Encouraging Deeper Learning Engagements with Students by Bradley Horton
Hi, the link you provided is working for me: https://de.mathworks.com/videos/quadcopter-modelling-and-simulation-a-case-study-...

7年以上前 | 0

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Getting the indices from a vector
This is a basic MATLAB operation. It is for instructional purposes. --- You may already know how to <http://www.mathworks....

7年以上前

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Return the first and last character of a string
Return the first and last character of a string, concatenated together. If there is only one character in the string, the functi...

7年以上前

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Roll the Dice!
*Description* Return two random integers between 1 and 6, inclusive, to simulate rolling 2 dice. *Example* [x1,x2] =...

7年以上前

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Magic is simple (for beginners)
Determine for a magic square of order n, the magic sum m. For example m=15 for a magic square of order 3.

7年以上前

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Number of 1s in a binary string
Find the number of 1s in the given binary string. Example. If the input string is '1100101', the output is 4. If the input stri...

7年以上前

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Make a random, non-repeating vector.
This is a basic MATLAB operation. It is for instructional purposes. --- If you want to get a random permutation of integer...

7年以上前

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Swap the input arguments
Write a two-input, two-output function that swaps its two input arguments. For example: [q,r] = swap(5,10) returns q = ...

7年以上前

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Reverse the vector
Reverse the vector elements. Example: Input x = [1,2,3,4,5,6,7,8,9] Output y = [9,8,7,6,5,4,3,2,1]

7年以上前

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Length of the hypotenuse
Given short sides of lengths a and b, calculate the length c of the hypotenuse of the right-angled triangle. <<http://upload....

7年以上前

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Generate a vector like 1,2,2,3,3,3,4,4,4,4
Generate a vector like 1,2,2,3,3,3,4,4,4,4 So if n = 3, then return [1 2 2 3 3 3] And if n = 5, then return [1 2 2...

7年以上前

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Finding Perfect Squares
Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...

7年以上前

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Maximum value in a matrix
Find the maximum value in the given matrix. For example, if A = [1 2 3; 4 7 8; 0 9 1]; then the answer is 9.

7年以上前

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Matlab base licence Tools
Hi, all these are seperate toolboxes that have to be aquired seperatly to use their functions. The version numbers always depen...

7年以上前 | 0

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Solve a numerical equation
Hi, use another x0: myfunc = @(x) ((1/6)*abs(sin(x*6/2)/sin(x/2)))-1/sqrt(2); x0 = 1; fzero(myfunc,x0); This will make it w...

7年以上前 | 0

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Unable to use function in script
Hi, you define an array as input arguments. Matlab interprets your array as one input argument, not as 8 as you think. This is ...

7年以上前 | 1

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Solving Differential Equations Symbolically and Numerically
Hi, why do you have the 2.derivative in your code? I do only find the first derivative in your attached equation. Also i think ...

7年以上前 | 0

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Undefined Function or Variable 'confusionchart'
Hi, confusionchart was introduced in R2018b. Since you are using R2018a it is not available. Update to R2018b to use it. To av...

7年以上前 | 2

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Generating random variables with decimal points
10*rand(25,1)+20

7年以上前 | 0

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Release note of the update?
Hi, not a release note, but a little list of Bug Fixes in Update 2. I hope this helps. Best regards Stephan

7年以上前 | 0

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Predictor Importance for Bagged Trees in Classification Learner App??
Hi, "I have sucessfully used BaggedTrees in the classificationLearner app to classify my data..." 1. Make sure to have exporte...

7年以上前 | 1

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