normalize

问题 I've started a new project and they have a very normalized database. everything that can be a lookup is stored as the foreign key to the lookup table. this is normalized and fine, but I end up doing 5 table joins for the simplest queries. from va in VehicleActions join vat in VehicleActionTypes on va.VehicleActionTypeId equals vat.VehicleActionTypeId join ai in ActivityInvolvements on va.VehicleActionId equals ai.VehicleActionId join a in Agencies on va.AgencyId equals a.AgencyId join vd in

问题 I have an array filled with positive int values, how could I normalize this list so the max value is always 100? Thank you in advance! 回答1: The idea is to first find the highest number in your array (using apply on Math.max), then find the ratio between that highest number and 100. After that, it's just a matter of looping through your array and dividing all your numbers by that ratio: var numbers = [3, 8, 45, 74, 123], ratio = Math.max.apply(Math, numbers) / 100, l = numbers.length, i; for

问题 This first matrix table1 contains normalized values for 5 names.I need to perform some operations on this matrix and I have to obtain second matrix as shown in table2. Diagonal elements of table2 should obtained by giving rank(ordinal value) to each value.That means highest element is given 5th rank and next 4th 3rd and so on. Remaining elements of table obtained by giving rank to each value starting from 4 because only 4 elements remaining. Because already we are given rank to diagonal

问题 I have a range of values like, for example, [0, 100] = [minValue, maxValue] and the number of bands, for example BANDS_NUMBER = 5 . So I can obtain these bands: [0 - 20] [21 - 40] [41 - 60] [61 - 80] [81 - 100] Then I want to associate a scale value at each range: i: 0 --> [0 - 20] --> 0.2 i: 1 --> [21 - 40] --> 0.4 i: 2 --> [41 - 60] --> 0.6 i: 3 --> [61 - 80] --> 0.8 i: 4 --> [81 - 100] --> 1 This value is computed in this way: (i + 1) / BANDS_NUMBER where i is the index of a hypothetical

问题 I have a request about surface normals. At the following code snippet is from the URL : http://www.kindohm.com/technical/wpf3dtutorial.htm private Model3DGroup CreateTriangleModel(Point3D p0, Point3D p1, Point3D p2) { MeshGeometry3D mesh = new MeshGeometry3D(); mesh.Positions.Add(p0); mesh.Positions.Add(p1); mesh.Positions.Add(p2); mesh.TriangleIndices.Add(0); mesh.TriangleIndices.Add(1); mesh.TriangleIndices.Add(2); Vector3D normal = CalculateNormal(p0, p1, p2); // mesh.Normals.Add(normal);

问题 The problem is normalizing a json with nested array of json objects. I have looked at similar questions and tried to use their solution to no avail. This is what my json object looks like. { "results": [ { "_id": "25", "Product": { "Description": "3 YEAR", "TypeLevel1": "INTEREST", "TypeLevel2": "LONG" }, "Settlement": {}, "Xref": { "SCSP": "96" }, "ProductSMCP": [ { "SMCP": "01" } ] }, { "_id": "26", "Product": { "Description": "10 YEAR", "TypeLevel1": "INTEREST", "Currency": "USD",

问题 The problem is normalizing a json with nested array of json objects. I have looked at similar questions and tried to use their solution to no avail. This is what my json object looks like. { "results": [ { "_id": "25", "Product": { "Description": "3 YEAR", "TypeLevel1": "INTEREST", "TypeLevel2": "LONG" }, "Settlement": {}, "Xref": { "SCSP": "96" }, "ProductSMCP": [ { "SMCP": "01" } ] }, { "_id": "26", "Product": { "Description": "10 YEAR", "TypeLevel1": "INTEREST", "Currency": "USD",

问题 I have a string with multiple newlines. The String: This is a dummy text. I need to format this. Desired Output: This is a dummy text. I need to format this. I'm using this: $replacer = array("\r\n", "\n", "\r", "\t", " "); $string = str_replace($replacer, "", $string); But it is not working as desired/required. Some of the words don't have spaces between them. Actually I need to convert the string with all the words separated by single spaces. 回答1: I would encourage you to use preg_replace :

问题 I have a string with multiple newlines. The String: This is a dummy text. I need to format this. Desired Output: This is a dummy text. I need to format this. I'm using this: $replacer = array("\r\n", "\n", "\r", "\t", " "); $string = str_replace($replacer, "", $string); But it is not working as desired/required. Some of the words don't have spaces between them. Actually I need to convert the string with all the words separated by single spaces. 回答1: I would encourage you to use preg_replace :

问题 I'm using matplotlib to plot log-normalized images but I would like the original raw image data to be represented in the colorbar rather than the [0-1] interval. I get the feeling there's a more matplotlib'y way of doing this by using some sort of normalization object and not transforming the data beforehand... in any case, there could be negative values in the raw image. import matplotlib.pyplot as plt import numpy as np def log_transform(im): '''returns log(image) scaled to the interval [0