linegraph

If I were to graph two time series, let's say they both have an upward positive trend from left to right, is there anyway to use pandas to find where the two lines intersect and how often? For example: How often do the two time series intersect: 1 What are the coordinates of the intersecting points: approx x-axis: 1955 y-axis: 7 Here is a quick try using pandas. import pandas as pd import numpy as np df = pd.DataFrame({"A":[1,2,3,4,5], "B":[0.5,3,1,1,6]}) print df Which gives A B 0 1 0.5 1 2 3.0 2 3 1.0 3 4 1.0 4 5 6.0 Then use the difference df['difference'] = df.A - df.B df['cross'] = np

I need to show progressive numeric stats to my Line Graph/Chart. Please share your opinion and advice. Please also make a note that I prefer if there would be a native API. rohit AChartEngine is a charting library for Android applications. It currently supports the following chart types: line chart area chart scatter chart time chart bar chart pie chart bubble chart doughnut chart range (high-low) bar chart dial chart / gauge combined (any combination of line, cubic line, scatter, bar, range bar, bubble) chart cubic line chart You can get more information from this link . Check out Zeitdata

I'm trying to generate a graph with gradient/shading effect. Now I'm able to draw line graph and applied gradient effect to that graph. It is applying to whole view not to the graph. Now I'm getting image like this. But I want like this. I want gradient effect just under the graph. Please help me in this. Thanks in advance. The code that I'm using is: UIGraphicsBeginImageContext(self.graphView.frame.size); [graphView.image drawInRect:CGRectMake(0, 0, self.graphView.frame.size.width, self.graphView.frame.size.height)]; CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound);

We generate graphs for huge datasets. We are talking 4096 samples per second, and 10 minutes per graph. A simple calculation makes for 4096 * 60 * 10 = 2457600 samples per linegraph. Each sample is a double (8 bytes) precision FP. Furthermore, we render multiple linegraphs on one screen, up to about a hundred. This makes we render about 25M samples in a single screen. Using common sense and simple tricks, we can get this code performant using the CPU drawing this on a 2D canvas. Performant, that is the render times fall below one minute. As this is scientific data, we cannot omit any samples.

I have a column graph, that shows a trend of consumption over time, The y-axis being consumption and x-axis being time in month, I have to implement a target consumption. I implemented a target, by adding data field with a Line chart type, this is a constant, and will just display a horizontal line. The problem i am facing is, if there is only one month, the line disappears? is there a way not to have it disappear, or is there a better way to add line target in column charts in SSRS I am using SSRS 2008 Adding a StripLine may do what you want. They are a little hard to find, but here is how: 1

I am creating a budget application in iPhone, to budget for personal incomes and expenses. Client's need is I want to see line graph (like stock market line report). Red line for (monthly / weekly / daily) expenses Green line for (monthly / weekly / daily) incomes The question is how? Till now, I have never faced this kind of requirement. Can you please some offer some guidance regarding creating line chart in iPhone? You should try Core Plot . I think this is the solution for it. If you want to use graphs in your application, there are two options for you. * Core Plot - http://code.google.com