core-plot

I am using CorePlot( https://github.com/core-plot/core-plot ) in Swift. In order to make a pie chart on iOS, I wrote as below by translating Obj-C code to swift. I was able to view the graph title, but I could not plot a pie chart. As a result of looking at NSlog, I found that “numberForPlot” function was apparently not called. How should I rewrite this? My code looks like this: ViewController.swift import UIKit class ViewController: UIViewController, CPTPieChartDataSource, CPTPieChartDelegate{ @IBOutlet var graphView : CPTGraphHostingView var dataForChart = NSNumber[](); override func

I'm using core-plot (and the barcharts) to display financial information. My problem is that whenever I use negative values, it seems that the scale of the shown graph is wrong. I'd like the entire graph to be visible, but often only a part of the graph is shown, leaving the bars cut off and sometimes not even the x-axis visible (the part shown is so far down on the y-axis). If I turn on the user-interaction, it's possible to scroll within the view to see different parts of the graph, but I want an overview, not study the graph in detail. Note that I do not use the whole screen for the graph,

I'm beginner with the Core Plot framework. Right now, I am able to render bar charts on the screen. However, I need to draw a horizontal bar chart that has the bars extending from the Y axis, like so: ^ y| |**** |******* |********** |****** |---------------> x How would I implement such a horizontal bar chart in Core Plot? you said you are using core-plot, there are sample codes with the framework, in which barChart has been implemented. You can have a look at it. EDIT: Sorry I saw you update now, and I got you need horizontal bars. Use following code. CPBarPlot * barPlot = [CPBarPlot ...];

I would like to show (annotate) values in a scatterplot as the mouse is moved/hovering over a symbol or line. I understand this question has been asked before but I can only find answers that require the user to click the plot to show this information. I have tried to implement the mouseMoved method in my plotView delegate: - (void)mouseMoved:(NSEvent *)theEvent { NSPoint location = [hostingView convertPoint: [theEvent locationInWindow] fromView: nil]; CGPoint mouseLocation = NSPointToCGPoint(location); CGPoint pointInHostedGraph = [hostingView.layer convertPoint: mouseLocation toLayer:

I am now using Core-plot to develop application. I am looking for some touch event for user touch one point of the chart, then it show up the price. When i take a look of the CorePlot website, It has a application show what i need http://code.google.com/p/core-plot/wiki/AppsUsingCorePlot I really want to do this function by Core-plot, i am now using CorePlot 0.4 i want to do the following function I really want to have a touch event which can show the specify price of the point user touch. Thank you very much!! CorePlot provides a lot of ways to detect user touches: For plots: -(void)barPlot:

I am trying to change default position of labels in Bar chart with Core-Plot. I am using this method: -(CPTLayer *)dataLabelForPlot:(CPTPlot *)plot recordIndex:(NSUInteger)idx; And I return: return textLayer = [[CPTTextLayer alloc] initWithText:@"2222" style:textStyle]; I get this result: But I want to appear as follows: Any idea? I tried to find answer on documentation, but I has been impossible. Use a negative labelOffset for the bar plot. The default is +10 which puts the labels 10 pixels above the bars. This property is inherited from CPTPlot so it works for all plot types, although the