Draw Line Graph Using Data From Array

[moose333]

Hello

I currently have a program that collects data from a txt file and then works out the averages of each column.

What I am now trying to do is use this data to draw a line Graph for each individual column contained within the txt file.

This is the code I currently have that reads the data and works out the averages.

private void GetDataFromFile()
        {
            Dictionary<int, List<int>> dic = new Dictionary<int, List<int>>();
            string tag = "[HRData]";
            string path = "test.txt";
            //string path = (Chosen_File);
            using (StreamReader sr = new StreamReader(path))
            {
                string line;
                int counter = 1;
                while ((line = sr.ReadLine()) != null)
                {
                    
                    if (line != tag)
                    {
                        counter = 1;
                        string[] lineData = line.Split('\t');
                        foreach (string data in lineData)
                        {
                            int number = Convert.ToInt32(data);
                            if (!dic.ContainsKey(counter))
                                dic.Add(counter, new List<int> { number });
                            else
                                dic[counter].Add(number);
                            counter++;
                        }
                    }
                }
            }

              
            StringBuilder sb = new StringBuilder();
            foreach (KeyValuePair<int, List<int>> kvp in dic)
            {
                var sum = kvp.Value.Average();
                sb.AppendLine("Column " + kvp.Key.ToString() + ": " + sum.ToString());
            }
            richTextBox1.Text = ("Column Averages:\n" + sb.ToString());
        }

This is the contents of the file I am reading.

[HRData]
97	117	0	-117	0	50
97	117	0	-117	0	50
97	183	0	-117	0	50
94	183	55	-117	34	50
95	210	56	-117	84	4931
95	207	59	-117	113	5438
95	196	57	-117	125	5944
97	248	56	-117	125	5944
98	255	64	-117	141	5432
100	252	64	-117	141	5432
101	248	79	-117	147	5444
102	237	82	-117	146	6456
104	235	82	-117	142	6457
105	247	84	-117	134	6458
106	261	87	-117	146	7220
106	268	87	-117	146	7220
107	281	91	-117	152	7475
108	292	95	-117	161	7733
109	297	98	-117	173	8245
110	301	101	-117	179	7733
111	299	103	-117	186	6966
112	297	106	-117	193	6445
113	294	105	-117	200	6706
115	293	104	-117	190	6703
116	294	103	-117	191	5685
117	297	105	-117	193	5688
118	294	105	-117	193	5432
118	293	103	-117	206	4922
119	293	103	-117	207	4914
120	294	104	-117	201	5678
120	294	104	-117	211	6195
121	292	103	-117	192	5939
121	289	102	-117	198	6712

I have been trying to read the data from the sub routine and then use it to draw a line graph onto a bitmap without much success.

If anyone can provide some help or point me in the right direction it would be much appreciated.

Thank you

[ddanbe]

Try to rework this snippet: http://www.daniweb.com/software-development/csharp/code/217204

[moose333]

Thanks for the reply.

I've looked through and it has helped, I understand now how I would draw the line graph. The problem I've now come across is that I need to get each column of data from the file into individual arrays that I can then call to get the changing points to plot the graph for each column.

Have you got any other examples that I could have a look at that might help?

Thank you