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Hiroki Okawa


Last seen: 4 maanden ago
52 total contributions since 2019

Ph.D. in engineering at Tokyo Institute of Technology.
Research Assistant at National Institute of Informatics

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  • Introduction to MATLAB Master
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Answered
開いているスクリプトのあるフォルダのパスを得る方法
fileparts関数はいかがでしょうか。 https://jp.mathworks.com/help/matlab/ref/fileparts.html file = 'H:\user4\matlab\myfile.txt' [filepath,n...

4 maanden ago | 2

| accepted

Answered
複数のグラフを一度に消去する方法はありますか?
グラフというのはFigureのことでしょうか。その場合はclose関数が有用です。 close all waitbar関数を使っているなど、上のスクリプトで消えないものがある場合は close all force を用いてみてください。

4 maanden ago | 1

| accepted

Answered
image関数で表示するY軸の表示方向を反転したい
axis xy を用いると左下原点になります。 左上原点に戻したいときは axis ij です。

4 maanden ago | 1

| accepted

Answered
添付画像の数式のプログラムの組み方がわかりません。
以下式に誤り等ありましたらすみません。 確認用に適当な乱数でパラメータを設定しました。 n = 20; m = 30; A = rand(1, m); B = rand(1, m); Y = rand(n, m); sigma2 = ...

4 maanden ago | 1

| accepted

Solved


Interpolator
You have a two vectors, a and b. They are monotonic and the same length. Given a value, va, where va is between a(1) and a(end...

7 maanden ago

Solved


Read a column of numbers and interpolate missing data
Given an input cell array of strings s, pick out the second column and turn it into a row vector of data. Missing data will be i...

7 maanden ago

Solved


Sum all integers from 1 to 2^n
Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.

7 maanden ago

Solved


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 maanden ago

Solved


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 maanden ago

Solved


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

7 maanden ago

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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 maanden ago

Solved


Create times-tables
At one time or another, we all had to memorize boring times tables. 5 times 5 is 25. 5 times 6 is 30. 12 times 12 is way more th...

7 maanden ago

Solved


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 maanden ago

Solved


Determine whether a vector is monotonically increasing
Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

7 maanden ago

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Check if number exists in vector
Return 1 if number _a_ exists in vector _b_ otherwise return 0. a = 3; b = [1,2,4]; Returns 0. a = 3; b = [1,...

7 maanden ago

Solved


Swap the first and last columns
Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

7 maanden ago

Solved


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 maanden ago

Solved


Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; ...

7 maanden ago

Solved


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 maanden ago

Solved


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 maanden ago

Solved


Triangle Numbers
Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

7 maanden ago

Solved


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 maanden ago

Solved


Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

7 maanden ago

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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 maanden ago

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Return area of square
Side of square=input=a Area=output=b

7 maanden ago

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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 maanden ago

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Add two numbers
Given a and b, return the sum a+b in c.

7 maanden ago

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Vector creation
Create a vector using square brackets going from 1 to the given value x in steps on 1. Hint: use increment.

7 maanden ago

Solved


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 ...

7 maanden ago

Solved


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

7 maanden ago

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