pandas agg

If the call to the custom top_n takes the agg function, then the reported error will be Illustrates a problem, using the AGG function to call Top_n, it is trying to use top_n for each packet aggregation, but the role of Top_n is a sort, not aggregation, so will definitely error So in this case, you can only use the Apply function, not the AGG function, the funct

Dedicated to: Either scenario is a compromise choice, and any alternative can achieve the same effect. And it all depends on how you think about positioning. Ask is learning, self-study is learning, but can stand on the shoulders of giants, you can see more clearly perhaps go farther.Excerpt from: http://franko.github.io/agg-intro/vertex-source.htmlIn the previous sections we have seenagg::p ath_storageObject. While the This object was very flexible a

Agg is a very powerful rendering engine. It uses standard C + + and basic C function implementations, but it does not use some template functions in C + + STL. So agg can be used in many situations, even in some end and embedded development. Agg can also be used on the Web server, you can render a picture on the server to return to the client,

In the last two sections, it was mentioned that AGG::RASTERIZER_SCANLINE_AA also support drawing lines, but unfortunately, we call the class move_to,line_to function completely without any effect, draw line, is not the picture, But in fact it is we do not set the width of the line segment, the end of the line shape, there is no way to call Agg::conv_stroke Ah!! And there is a problem, using move_to to repla

> 1/does the algorithm works only from0,0 to Frame_width,frame_height?> Is there a-to define a "worldcoordinate system" different than the> "Renderer coordinate System" (let ' s say rendering lines bounded between> -100,-100 100,100 in a 100x100 buffer,without translating/rescaling all> The coordinates of my lines).> I ' ve found the Agg::conv_transform andagg::conv_curve classes. Is.> The How to go?It ' s done by Trans_viewport, seeagg_trans_viewport

as the name says: auto-detect direction, what direction, many people may not understand, through AGG e-Mail learned several things: the extension contour is related to the direction in which the drawing is drawn ( that is, the move_to,line_to, the clockwise, or counterclockwise) of the shape. As in the next two examples, one is to draw the rectangle clockwise, one to draw the rectangle counterclockwise, and then to expand the contour line. Example1Cou

Test code:void Drawintersectcontour (){Agg::rendering_buffer rbuf = Rbuf_window ();Agg::p ixfmt_bgr24 pixf (RBUF);typedef agg::renderer_baseRenderer_base_type Renb (PIXF);typedef agg::renderer_scanline_aa_solidRenderder_scanline_type Rensl (RENB);Agg::rasterizer_scanline_aaA

For the agg font for a very simple introduction, the following is a simple description of the agg line. first for drawing lines, there are several lines such as ordinary lines, actual lines, lattice-like lines. Agg is supported for each line. In addition to the beginning of the line of the end of the style there are several, this property is usually identified b

header file:agg/include/agg_trans_single_path.hsource file:agg/src/agg_trans_single_path.cpp1 total_lengthStatistical path lengthagg::p ath_storageps;Ps.move_to (100,20);Ps.line_to (10,200);Ps.line_to (200,200);Agg::trans_single_path Tspath;Tspath.add_path (PS);Double npathlen= tspath.total_length ();2 transformI don't know for a momentAgg::trans_single_path Tcurve;Tcurve.add_path (M_path_storage);Double len = Tcurve.total_length ();int n = 3;Double x

can be identified The construction parameter of curve information in Vertexsource is Vertexsource,conv_smooth_poly1_curve based on it. Example thread's vertex has no curve information and will be used for text output. Agg::bezier_arc A (100,100, 50,50, 0.0, agg::p I/2);Agg::conv_curveAgg::conv_strokeAgg::conv_strokeRas.add_path (s);Ras.add_path (stroke);//Compari

The instance code is as follows:Ras.reset ();Agg::ellipse ell (400,400,20,70);Coordinate transformationAgg::trans_affine MTX;Mtx.scale (0.5,1); The x-axis shrinks to half the original.Mtx.rotate (agg::d Eg2rad (30));//Rotate 30 degreesMtx.translate (200,200);//x,y coordinates translate 100 respectivelytypedef agg::conv_transformEll_ct_type Ctell (ELL,MTX); Matrix

1 PrefaceI added the possibility to shorten paths in Convertersconv_stroke and Conv_dash.It ' s good for drawingarroheads with rather thick strokes.Also thre ' s aconverter agg_conv_shoren_path.h that can be usedindependently.I also added agg_conv_concat.h that also helps to workwith markers. Before had to Call:ras.add_path (stroke); Ras.add_path (arrow); Now you can use the agg::conv_concat that simplyconcatenetes the paths into one.2 Sample CodeM_sl

excerpt from:http://bbs.csdn.net/topics/3602263331)C + + template interface is not normalized2) FontIn addition, it is recommended that the Font section be renamed Optional because the freetype2 itself is already very good. Agg just use the outline of freetype2, but sometimes the font default output is the dot matrix, no contour, this is agg font display, such as the size of the lattice SUNSIM.TTC the font

calculatetheorientationandpositionofeachletterand Applytheaffinetransformationtothewholeglyph.trans_single_pathhasastandard Interface,voidtransform (double*x,double*y). butitshouldn ' t beinthegeneralpipeline.recently I ' ve been working with Agg::trans_single_path to draw text alongsome agg::p ath_storage. Finally I did it but I ' ve noticed some strangebehaviour. Here ' s a description.When I try to draw

This article mainly introduces you to the pandas in Python. Dataframe to exclude specific lines of the method, the text gives a detailed example code, I believe that everyone's understanding and learning has a certain reference value, the need for friends to see together below. When you use Python for data analysis, one of the most frequently used structures is the dataframe of pandas, about

Teach you how to use Pandas pivot tables to process data (with learning materials) and pandas learning materials Source: bole online-PyPer Total2203 words,Read5Minutes.This article mainly explains pandas's pivot_table function and teaches you how to use it for data analysis. Introduction Most people may have experience using pivot tables in Excel. In fact, Pandas