C++ program creating array the uses the dot product? normalized dot product // Matches the Signal with the Pattern Signal using the "dot product" // of Signal and Pattern divided by the square root of the energy of each. // According to the Cauchy-Schwartz inequality, the result will be // between -1 and +1; +1.0 where identical, near 0.0 where unalike and // -1.0 when the object Signal is the negative of the pattern Signal. // // The Pattern must be no longer than the Signal: if it is, an error // value of -2.0 is returned immediately. If Signal is longer than // Pattern, then the appropriate "head" of Signal is used. Thus the // signal vector operation is dot(Pattern[0,L-1], Signal[0,L-1]). // // The application, or client, can scan the Pattern along the Signal // in a loop to create an output signal. That operation is called // normalized cross correlation.
// Restrict the dot product to the subsignal of amplitudes from // S[LO]..S[HI] and otherwise behave as the above function. // Useful for client to search signal object for a matching pattern, // such as finding the next EKG (heart wave) cycle from the current one.
I am confused what this question is asking, any help understanding it would be awesome. We have a pre set up array with quantitys inside it.
Ala00003 the right idea. A dot product is really a projection of one vector on to another but can be thought of as a sort of correlation. Look into the other formula for the dot product (they are in fact equivalent but with n years of brain rust I can't run through it) which for vectors of points [x0,x1,x2,x3] and [y0,y1,y2,y3] is x0y0+x1y1+x2y2 + ... (you're essentially multiplying XY' where Y' is Y transpose).