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(J, 1), 480-b (J, 2 ),'*');End;Hold off; 8. Use unknown characters in MATLAB operations You can declare this character with Syms before using this character in computing. For example: > Syms;> B = [cos (a) sin (a);-sin (a) Cos (a)]B =[Cos (A), sin (a)][-Sin (A), cos (a)]> Inv (B)Ans =[

;y = sin(x);plot(x,y); Run the following sine function: Of course, you can also draw two straight lines at the same time and draw multiple curves with different colors: x = 0:0.01:2*pi;y = sin(x);y1 = sin(x);y2 = cos(x);z = [y1 ; y2];plot(x,z); The drawing effect is as follows: For example, set multiple row vectors for Z: x = 0:0.01:2*pi;y = sin(x);y1 = sin(x);y2 = cos(x);y3 = exp(x);y4 = x;y5 = tan(x);

in order to be used, so the mathematical expression cannot be expressed. So be sure to introduce special symbols here, there are two ways Method One from Import = symbols ('x y'= x + ++ 2*y Method Two from Import = x + ++ 2*y* * When a variable in a mathematical expression is not a single character, such as X, Y, but a variable of multiple character length of result, only method one is used.3.2 Expand and collapse from Import Expand,factor from Import = x**2+x*

from:http://blog.csdn.net/zhuqiuhui/article/details/531803951. Find the azimuth of two latitude and longitude points, P0 (LatA, Lona), P1 (LATB, lonb) (many blogs do not write very well, summarize here) def getdegree (LatA, Lona, LATB, lonb): "" " Args: Point P1 (LatA, Lona) point P2 (LATB, lonb) Returns : bearing between the "GPS points, default:the basis of heading direction is" "" radlata = Radia NS (LatA) Ra

()/2);Degrees | Degrees---------+---------180 | 90(1 row)1.9. Sine function: sin (x) and inverse sine function: ASIN (x)Sin (x) returns the X-sine, where x is the Radian value.testdb=# Select sin (1), round (Sin (pi));Sin | Round-------------------+-------0.841470984807897 | 0(1 row)ASIN (x) returns the inverse of x, which is the value of the sine of X. If x is not in the range 1 to 1, an error message pops up: The input is out of range.1.10. Cosine function:

COS in popular groups is really good ~ Come and have a look ~ This COS is the storm! China's popular COSPLAY group Pink Monkey heaven "League of legends" once again launched a strong attack, release a group of national servers not yet logged on wind and snow skin COS. Coser from small love hair style, clothing, props, to temperament are successfully restored the

= (double) pointx [0] * Math. PI/180;Middley = (double) pointy [0] * Math. PI/180;Highx = (double) pointx [1] * Math. PI/180;Highy = (double) pointy [1] * Math. PI/180;}Else if (I = count-1){Lowx = (double) pointx [count-2] * Math. PI/180;Lowy = (double) pointy [count-2] * Math. PI/180;Middlex = (double) pointx [count-1] * Math. PI/180;Middley = (double) pointy [count-1] * Math. PI/180;Highx = (double) pointx [0] * Math. PI/180;Highy = (double) pointy [0] * Math. PI/180;}Else{Lowx = (double) po

Atitit. Implementation principle of file upload with progress bar and component selection and Best Practices summary O7 1. Implementation Principle 1 2. Principle of uploading large files: Using applet 1 3. New BP 2 1. Performance Improvement-split up small files for upload to avoid using too much memory at a time. 2 2. UUID or original file name: 2 3. Listener is frequently called 2 4. Combined with WZ easyui 2 4. Type Selection 2 5. uploadify: Yash JS + flash 3 6. commons-fileupload: 3 7.

Halfwidth formula:(Positive and negative are determined by the quadrant) Triangle Formula: 　 Acute angle trigonometric function Any angle trigonometric function Graphics Right Triangle Any angle trigonometric function Sin) Cosine (COS) Tangent (tan or TG) Cotangent (cot or CTG) Cut (SEC) Union cut (CSC) Reciprocal Re

was when I was. But look at:The first picture is a depressed sine wave cos (x)The second picture is the superposition of the 2-selling sine wave cos (x) +a.cos (3x)The third picture is a superposition of 4 spring sine wavesThe four images are the superposition of 10 constipation sine wavesAs the number of sine waves increases gradually, they eventually stack up into a standard rectangle, and what do you ge

chicken soup, but a solid formula on the blackboard: Fourier told us that any periodic function, can be seen as a different amplitude, different phase sine wave superposition. In the first example, we can understand that by using different strokes of different keys and different points of time, you can combine any piece of music.One of the methods through time domain and frequency domain is Fourier analysis of crossing. Fourier analysis can be divided into Fourier series (Fourier Serie) and Fou

strings to the coordinate pairs:Plot (X,sin (x), ' r* ')5 Using the axis ([Xmin,xmax,ymin,ymax]) function to adjust the extent of the graph axisAxis ([0,6,-1.5,1])6 Matlab can also add various annotations and processing of graphics: (see table above)Xlabel (' x-axis '); % x Axis annotationsYlabel (' Y axis '); % y-axis annotationsTitle (' cosine function '); % Graphics titleLegend (' y = cos (x) '); % Graphics annotationsGtext (' y =

This article mainly introduces about PHP according to latitude and longitude sorting, according to latitude and longitude to filter the distance segment, has a certain reference value, now share to everyone, the need for friends can refer to SQL statements: Select Location.* from (select *,round (6378.138*2*asin (sqrt () (Pow () (Sin (36.668530*pi ()/180-px_lat*pi ()/180)/2), 2) +cos (36.668530*pi ()/180) *cos