This post categorized under Vector and posted on March 25th, 2019.

In R I have an element x and a vector v. I want to find the first index of an element in v that is equal to x. I know that one way to do this is which(x v)[[1]] but that seems excessively inefficient.Future readers may also be interested in findInterval which isnt quite what is needed here but is another tool to find which two values a number is between.Vector Questions a selection of answers from the Dr. Math archives. What is a Vector I am having trouble understanding exactly what a vector is and cannot seem to

Section 1-8 Tangent Normal and Binormal Vectors. In this section we want to look at an application of derivatives for vector functions. Actually there are a couple of applications but they all come back to needing the first one.188 thoughts on Support Vector Regression with R Jose November 8 2014 at 1235 pm. Good stuff. How would this behave if for example I wanted to predict some more X Using Trigonometry to Determine a Vectors Direction. The direction of a resultant vector can often be determined by use of trigonometric functions.

Finding improved local minima of power system optimization problems by interior-point methodsIn mathematics the quaternions are a number system that extends the complex numbers. They were first described by Irish mathematician William Rowan Hamilton in 1843 and applied to mechanics in three-dimensional space.In mathematics the axisangle representation of a rotation parameterizes a rotation in a three-dimensional Euclidean space by two quantities a unit vector e indicating the direction of an axis of rotation and an angle describing the magnitude of the rotation about the axis.

Multiplying two vectors will sometimes give you another vector known as a cross product which has many important applications in the real world.CRO [more]

An explanation of how to leverage python libraries to quickly forecast seasonal time series data.I have demonstrated best-fitting an ARIMA model to [more]

Perhaps you want to convert the character values to meaningful time values. In that case POSIXt time objects are a good choice. In that case POSIXt [more]

A fuzzy hybrid learning algorithm for radial basis function neural network with application in human face recognitionQuantifier Guided Aggregation [more]

Learn all about the center of our universe with this handy diagram worksheet. Make sure to hold onto it for easy test prep in the futureNew York St [more]

Note that if you bought a Vector 3S unit youll still get two pedals. Its just that one of those pedals wont have any sensorselectronics in it.The V [more]

Learn how to create line charts in R with the function lines(x y type) where x and y are numeric vectors of (xy) points to connect.The volume of th [more]

THEORY OF COMMUNICATION By D. GABOR Dr. Ing. graphicociate Meiber.j (The paper was first received 25th November 1944 and in revised form 24thSeptem [more]

There are three important unit vectors which are commonly used and these are the vectors in the direction of the x y and z-axes. The unit vector in [more]