private void Filter_Click(object sender, EventArgs e)
{
foreach (var series in chart1.Series)
{
series.Points.Clear();
}
chart1.Visible = true;
int chanCount = comboBox_chanCount.SelectedIndex + 1;
for (int i = 0; i < chanCount; i++)
{
for (int j = 0; j < Convert.ToInt32(LowFrequency.Text) * time / 1000; j++)
{
value[i][j] = 0.0;
ivalue[i][j] = 0.0;
}
for (int j = Convert.ToInt32(HighFrequency.Text) * time / 1000; j < num; j++)
{
value[i][j] = 0.0;
ivalue[i][j] = 0.0;
}
}
for (int i = 0; i < chanCount; i++)
{
double[] values = (double[])value[i].ToArray(typeof(double));
double[] ivalues = (double[])ivalue[i].ToArray(typeof(double));
TWFFT.IFFT(values, ivalues);
for (int j = 0; j < num; j++)
{
chart1.Series[i].Enabled = true;
if (values[j] != 0)
{
chart1.Series[i].Points.AddY(values[j]);
}
}
}
}
private void FFT_Click(object sender, EventArgs e)
{
int chanCount = comboBox_chanCount.SelectedIndex + 1;
for (int i = 0; i < chanCount; ++i)
{
double[] values = (double[])xreal[i].ToArray(typeof(double));
double[] ivalues = new double[values.Length];
num = values.Length;
for (int j = 0; j < values.Length; j++)
{
ivalues[j] = 0;
}
TWFFT.FFT(values, ivalues);
//TWFFT.IFFT(values, ivalues);
for (int j = 0; j < values.Length; j++)
{
value[i].Add(values[j]);
ivalue[i].Add(ivalues[j]);
}
}
string result = fname.Insert(fname.LastIndexOf('.'), " FFT");
using (FileStream fs = File.Open(result, FileMode.OpenOrCreate))
{
StreamWriter w = new StreamWriter(fs);
w.BaseStream.Seek(0, SeekOrigin.End);
w.Write("\r\nFFT:\r\n");
for (int i = 0; i < chanCount; i++)
{
w.BaseStream.Seek(0, SeekOrigin.End);
w.Write("channel " + i.ToString() + "\r\n");
for (int j = 0; j < num; j++)
{
//写文件
w.Write(value[i][j].ToString() + " ");
w.Write(ivalue[i][j].ToString() + " ");
w.Write("\r\n");
}
}
w.Flush();
w.Close();
}
chart1.ChartAreas[0].AxisY.Maximum = trackBar2.Value;
// chart1.ChartAreas[0].AxisX.Maximum = trackBar1.Value;
double[] Power = { 0, 0, 0, 0, 0, 0, 0, 0 };
double[] Freq = { 0, 0, 0, 0, 0, 0, 0, 0 };
for (int i = 0; i < chanCount; i++)
{
double power = 0;
int frequency = 0;
double[] values = (double[])value[i].ToArray(typeof(double));
double[] ivalues = (double[])ivalue[i].ToArray(typeof(double));
for (int j = 0; j < num; j++)
{
if (power < values[j] * values[j] + ivalues[j] * ivalues[j])
{
power = (values[j] * values[j] + ivalues[j] * ivalues[j]);
frequency = j;
}
}
Power[i] = power;
Freq[i] = frequency * 1000 / time;
}
;
//control list view ,one grid indicates a channel which specials with color and value.
ListView2.Clear();
ListView2.FullRowSelect = false;
ListView2.Width = 480;
ListView2.Height = 21;
ListView2.View = View.Details;// Set the view to show details.
ListView2.HeaderStyle = ColumnHeaderStyle.None;
ListView2.GridLines = true;
// there are 8 columns for every item.
for (int k = 0; k < 8; k++)
{
ListView2.Columns.Add("", 60);
}
// modify the grid's height with image Indirectly.
ImageList imgList2 = new ImageList();
imgList2.ImageSize = new Size(1, 21); //width and height.
ListView2.SmallImageList = imgList2; //use imgList to modify the height of listView grids.
// create two ListViewItem objects,so there are 16 grids for listView.
m_firstItem2 = new ListViewItem();
m_firstItem2.SubItems.Clear();
m_firstItem2.UseItemStyleForSubItems = false;
m_firstItem2.Font = new Font("SimSun", 10);
m_firstItem2.SubItems[0].Text = String.Format("{0:0}", Power[0]);
m_firstItem2.SubItems[0].BackColor = m_simpleGraph.Pens[0].Color;
for (int k = 1; k < 8; k++)
{
if (k < chanCountSet)
{
m_firstItem2.SubItems.Add((String.Format("{0:0}", Power[k])), Color.Black, Color.Honeydew, new Font("SimSun", 10));
m_firstItem2.SubItems[k].BackColor = m_simpleGraph.Pens[k].Color;
}
else
{
m_firstItem2.SubItems.Add("");
m_firstItem2.SubItems[k].BackColor = Color.White;
}
}
ListViewItem[] list2 = new ListViewItem[] { m_firstItem2 };
ListView2.Items.AddRange(list2);
ListView3.Clear();
ListView3.FullRowSelect = false;
ListView3.Width = 480;
ListView3.Height = 21;
ListView3.View = View.Details;// Set the view to show details.
ListView3.HeaderStyle = ColumnHeaderStyle.None;
ListView3.GridLines = true;
// there are 8 columns for every item.
for (int k = 0; k < 8; k++)
{
ListView3.Columns.Add("", 60);
}
// modify the grid's height with image Indirectly.
ImageList imgList3 = new ImageList();
imgList3.ImageSize = new Size(1, 21); //width and height.
ListView3.SmallImageList = imgList3; //use imgList to modify the height of listView grids.
// create two ListViewItem objects,so there are 16 grids for listView.
m_firstItem3 = new ListViewItem();
m_firstItem3.SubItems.Clear();
m_firstItem3.UseItemStyleForSubItems = false;
m_firstItem3.Font = new Font("SimSun", 10);
m_firstItem3.SubItems[0].Text = String.Format("{0:0}", Freq[0]);
m_firstItem3.SubItems[0].BackColor = m_simpleGraph.Pens[0].Color;
for (int k = 1; k < 8; k++)
{
if (k < chanCountSet)
{
m_firstItem3.SubItems.Add((String.Format("{0:0}", Freq[k])), Color.Black, Color.Honeydew, new Font("SimSun", 10));
m_firstItem3.SubItems[k].BackColor = m_simpleGraph.Pens[k].Color;
}
else
{
m_firstItem3.SubItems.Add("");
m_firstItem3.SubItems[k].BackColor = Color.White;
}
}
ListViewItem[] list3 = new ListViewItem[] { m_firstItem3 };
ListView3.Items.AddRange(list3);
FFT.Enabled = false;
}