def plotProgresskMeans(X, centroids, previous, idx, K, i):
"""Display the progress of k-Means as it is running."""
util.plotDataPoints(X, idx)
plt.plot(centroids[:, 0], centroids[:, 1], 'kx')
for j in range(len(centroids)):
# plt.plot([centroids[j, 0], previous[j, 0]],
# [centroids[j, 1], previous[j, 1]], 'k')
util.drawLine(centroids[j, :], previous[j, :], 'k')
plt.title('Iteration number %d' % (i + 1))
def OnPaint(self, event):
dc = wx.BufferedPaintDC(self, self.screenBuf)
size = self.GetClientSize()
dc.SetBrush(wx.WHITE_BRUSH)
dc.SetPen(wx.WHITE_PEN)
dc.DrawRectangle(0, 0, size.width, size.height)
dc.SetPen(wx.BLACK_PEN)
dc.SetTextForeground(wx.BLACK)
for y in range(self.rows + 1):
util.drawLine(dc, self.offset, self.offset + y * self.cellSize,
self.cols * self.cellSize + 1, 0)
for x in range(self.cols + 1):
util.drawLine(dc, self.offset + x * self.cellSize,
self.offset, 0, self.rows * self.cellSize)
dc.SetFont(self.normalFont)
for y in range(self.rows):
for x in range(self.cols):
i = y * self.cols + x
if i < len(self.chars):
util.drawText(dc, self.chars[i],
x * self.cellSize + self.offset + self.cellSize // 2 + 1,
y * self.cellSize + self.offset + self.cellSize // 2 + 1,
util.ALIGN_CENTER, util.VALIGN_CENTER)
y = self.offset + self.rows * self.cellSize
pad = 5
if self.selected:
self.drawCharBox(dc, "Selected:", self.selected, self.offset,
y + pad, 75)
c = util.upper(self.selected)
if c == self.selected:
c = util.lower(self.selected)
if c == self.selected:
c = None
if c:
self.drawCharBox(dc, "Opposite case:", c, self.offset + 150,
y + pad, 110)
dc.SetFont(self.smallFont)
dc.DrawText("Character code: %d" % ord(self.selected),
360, y + pad)
else:
dc.SetFont(self.smallFont)
dc.DrawText("Click on a character to select it.", self.offset,
y + pad)
def OnPaint(self, event):
dc = wx.BufferedPaintDC(self, self.screenBuf)
cfgGui = self.getCfgGui()
w, h = self.GetClientSizeTuple()
dc.SetBrush(cfgGui.tabBarBgBrush)
dc.SetPen(cfgGui.tabBarBgPen)
dc.DrawRectangle(0, 0, w, h)
dc.SetPen(cfgGui.tabBorderPen)
dc.DrawLine(0, h - 1, w, h - 1)
xpos = self.paddingX
tabW = self.tabWidth
tabH = h - 2
tabY = h - tabH
if not self.font:
textH = h - self.textY - 1
self.font = util.createPixelFont(textH, wx.FONTFAMILY_DEFAULT,
wx.NORMAL, wx.NORMAL)
self.boldFont = util.createPixelFont(textH, wx.FONTFAMILY_DEFAULT,
wx.NORMAL, wx.BOLD)
maxTab = self.getLastVisibleTab()
for i in range(self.firstTab, maxTab + 1):
dc.SetFont(self.font)
p = self.pages[i]
dc.DestroyClippingRegion()
dc.SetClippingRegion(xpos, tabY, tabW, tabH)
dc.SetPen(cfgGui.tabBorderPen)
if i == self.selected:
points = ((6, 1), (tabW - 8, 1), (tabW - 6, 2),
(tabW - 2, tabH), (0, tabH), (4, 2))
dc.SetBrush(cfgGui.workspaceBrush)
else:
points = ((5, 2), (tabW - 8, 2), (tabW - 6, 3),
(tabW - 2, tabH - 1), (0, tabH - 1), (3, 3))
dc.SetBrush(cfgGui.tabNonActiveBgBrush)
dc.DrawPolygon(points, xpos, tabY)
# clip the text to fit within the tabs
dc.DestroyClippingRegion()
dc.SetClippingRegion(xpos, tabY, tabW - self.paddingX * 3, tabH)
dc.SetPen(cfgGui.tabTextPen)
dc.SetTextForeground(cfgGui.tabTextColor)
dc.DrawText(p[1], xpos + self.paddingX, self.textY)
dc.DestroyClippingRegion()
dc.SetFont(self.boldFont)
dc.DrawText(u"\u00d7", xpos + tabW - self.paddingX * 2, self.textY)
xpos += tabW
# start of right arrow
rx = w - 1 - self.paddingX - self.arrowWidth + 1
if self.firstTab != 0:
dc.DestroyClippingRegion()
dc.SetPen(cfgGui.tabTextPen)
util.drawLine(dc, rx - self.arrowSpacing - 1, self.arrowY, 0,
self.arrowHeight)
util.drawLine(dc, rx - self.arrowSpacing - 2, self.arrowY,
-self.arrowWidth + 1, self.arrowHeight // 2 + 1)
util.drawLine(dc, rx - self.arrowSpacing - self.arrowWidth,
self.arrowY + self.arrowHeight // 2,
self.arrowWidth - 1, self.arrowHeight // 2 + 1)
if maxTab < (len(self.pages) - 1):
dc.DestroyClippingRegion()
dc.SetPen(cfgGui.tabTextPen)
util.drawLine(dc, rx, self.arrowY, 0, self.arrowHeight)
util.drawLine(dc, rx + 1, self.arrowY, self.arrowWidth - 1,
self.arrowHeight // 2 + 1)
util.drawLine(dc, rx + 1, self.arrowY + self.arrowHeight - 1,
self.arrowWidth - 1, -(self.arrowHeight // 2 + 1))
def OnPaint(self, event):
dc = wx.BufferedPaintDC(self, self.screenBuf)
cfgGui = self.getCfgGui()
w, h = self.GetClientSizeTuple()
dc.SetBrush(cfgGui.tabBarBgBrush)
dc.SetPen(cfgGui.tabBarBgPen)
dc.DrawRectangle(0, 0, w, h)
dc.SetPen(cfgGui.tabBorderPen)
dc.DrawLine(0,h-1,w,h-1)
xpos = self.paddingX
tabW = self.tabWidth
tabH = h - 2
tabY = h - tabH
if not self.font:
textH = h - self.textY - 1
self.font = util.createPixelFont(
textH, wx.FONTFAMILY_DEFAULT, wx.NORMAL, wx.NORMAL)
self.boldFont = util.createPixelFont(
textH, wx.FONTFAMILY_DEFAULT, wx.NORMAL, wx.BOLD)
maxTab = self.getLastVisibleTab()
for i in range(self.firstTab, maxTab + 1):
dc.SetFont(self.font)
p = self.pages[i]
dc.DestroyClippingRegion()
dc.SetClippingRegion(xpos, tabY, tabW, tabH)
dc.SetPen(cfgGui.tabBorderPen)
if i == self.selected:
points=((6,1),(tabW-8,1),(tabW-6,2),(tabW-2,tabH),(0,tabH),(4,2))
dc.SetBrush(cfgGui.workspaceBrush)
else:
points=((5,2),(tabW-8,2),(tabW-6,3),(tabW-2,tabH-1),(0,tabH-1),(3,3))
dc.SetBrush(cfgGui.tabNonActiveBgBrush)
dc.DrawPolygon(points,xpos,tabY)
# clip the text to fit within the tabs
dc.DestroyClippingRegion()
dc.SetClippingRegion(xpos, tabY, tabW - self.paddingX * 3, tabH)
dc.SetPen(cfgGui.tabTextPen)
dc.SetTextForeground(cfgGui.tabTextColor)
dc.DrawText(p[1], xpos + self.paddingX, self.textY)
dc.DestroyClippingRegion()
dc.SetFont(self.boldFont)
dc.DrawText("×", xpos + tabW - self.paddingX * 2, self.textY)
xpos += tabW
# start of right arrow
rx = w - 1 - self.paddingX - self.arrowWidth + 1
if self.firstTab != 0:
dc.DestroyClippingRegion()
dc.SetPen(cfgGui.tabTextPen)
util.drawLine(dc, rx - self.arrowSpacing - 1, self.arrowY,
0, self.arrowHeight)
util.drawLine(dc, rx - self.arrowSpacing - 2, self.arrowY,
-self.arrowWidth + 1, self.arrowHeight // 2 + 1)
util.drawLine(dc, rx - self.arrowSpacing - self.arrowWidth,
self.arrowY + self.arrowHeight // 2,
self.arrowWidth - 1, self.arrowHeight // 2 + 1)
if maxTab < (len(self.pages) - 1):
dc.DestroyClippingRegion()
dc.SetPen(cfgGui.tabTextPen)
util.drawLine(dc, rx, self.arrowY, 0, self.arrowHeight)
util.drawLine(dc, rx + 1, self.arrowY, self.arrowWidth - 1,
self.arrowHeight // 2 + 1)
util.drawLine(dc, rx + 1, self.arrowY + self.arrowHeight - 1,
self.arrowWidth - 1, -(self.arrowHeight // 2 + 1))
def OnPaint(self, event):
dc = wx.BufferedPaintDC(self, self.screenBuf)
size = self.GetClientSize()
dc.SetBrush(wx.WHITE_BRUSH)
dc.SetPen(wx.WHITE_PEN)
dc.DrawRectangle(0, 0, size.width, size.height)
dc.SetPen(wx.BLACK_PEN)
dc.SetTextForeground(wx.BLACK)
for y in range(self.rows + 1):
util.drawLine(dc, self.offset, self.offset + y * self.cellSize,
self.cols * self.cellSize + 1, 0)
for x in range(self.cols + 1):
util.drawLine(dc, self.offset + x * self.cellSize, self.offset, 0,
self.rows * self.cellSize)
dc.SetFont(self.normalFont)
for y in range(self.rows):
for x in range(self.cols):
i = y * self.cols + x
if i < len(self.chars):
util.drawText(
dc, self.chars[i], x * self.cellSize + self.offset +
self.cellSize // 2 + 1, y * self.cellSize +
self.offset + self.cellSize // 2 + 1,
util.ALIGN_CENTER, util.VALIGN_CENTER)
y = self.offset + self.rows * self.cellSize
pad = 5
if self.selected:
code = ord(self.selected)
self.drawCharBox(dc, "Selected", self.selected, self.offset,
y + pad, 75)
c = util.upper(self.selected)
if c == self.selected:
c = util.lower(self.selected)
if c == self.selected:
c = None
if c:
self.drawCharBox(dc, "Opposite Case", c, self.offset + 150,
y + pad, 110)
dc.SetFont(self.smallFont)
dc.DrawText("Character Code: %d" % code, 360, y + pad)
if code == 32:
dc.DrawText("Normal Space", 360, y + pad + 30)
elif code == 160:
dc.DrawText("Non-breaking Space", 360, y + pad + 30)
else:
dc.SetFont(self.smallFont)
dc.DrawText("Select a character", self.offset, y + pad)
plt.xlim([0.5, 6.5])
plt.ylim([2, 8])
wait = input('Program paused. Press enter to continue.\n')
# %% =============== Part 2: Principal Component Analysis ===============
print('Running PCA on example dataset.')
# Before running PCA, it is important to first normalize X
X_norm, mu, sigma = util.featureNormalize(X)
# Run PCA
[U, S] = pca(X_norm)
util.drawLine(mu, mu + 1.5 * S[0] * U[:, 0], '--k')
util.drawLine(mu, mu + 1.5 * S[1] * U[:, 1], '--k')
plt.show()
wait = input('Program paused. Press enter to continue.\n')
# %% =================== Part 3: Dimension Reduction ===================
print('Dimension reduction on example dataset.')
# Plot the normalized dataset (returned from pca)
plt.figure(figsize=([4, 4]))
plt.scatter(X_norm[:, 0], X_norm[:, 1], alpha=0.5)
plt.xlim([-4, 3])
plt.ylim([-4, 3])
