Plot a piecewise-defined function












0












$begingroup$


I would like to plot the following function:



$$
begin{align}
Lambda(deltatau) &equiv chi(deltatau, 0)
= frac{1}{T_i} int_0^{T_i} a(t_0+t')a(t_0+t'+deltatau) dt' \
&= begin{cases}
1 - frac{left|deltatauright|}{tau_c}, &left|deltatauright| le tau_c(1+frac{tau_c}{T_i}) \
-frac{tau_c}{T_i}, &left|deltatauright| gt tau_c(1+frac{tau_c}{T_i}) \
end{cases}
end{align}
$$

which represents a simple triangular shape.
There is a conditional statement. My implementation uses a for loop as follows:



def waf_delay(delay_increment):
for d in delay_increment:
if np.abs(d) <= delay_chip*(1+delay_chip/integration_time):
yield 1 - np.abs(d)/delay_chip
else:
yield -delay_chip/integration_time;

integration_time = 1e-3 # seconds
delay_chip = 1/1.023e6 # seconds

x=np.arange(-5.0, 5.0, 0.1)
y=list(waf_delay(x))
plt.plot(x, y)
plt.show()


Is there a more correct way to transform an array based on a condition rather than just looping through it? Instead of having something like this:




def f(x_array):
for x in x_array:
if np.abs(x) <= 3:
yield 1 - x/3
else:
yield 0

x=np.arange(-5.0, 5.0, 0.1)
y=list(f(x))
plt.plot(x, y)
plt.show()



I would like to write something like this:




def f(x):
if np.abs(x) <= 3:
yield 1 - x/3
else:
yield 0


x=np.arange(-5.0, 5.0, 0.1)
plt.plot(x, f(x))
plt.show()



that could take an array.










share|improve this question











$endgroup$

















    0












    $begingroup$


    I would like to plot the following function:



    $$
    begin{align}
    Lambda(deltatau) &equiv chi(deltatau, 0)
    = frac{1}{T_i} int_0^{T_i} a(t_0+t')a(t_0+t'+deltatau) dt' \
    &= begin{cases}
    1 - frac{left|deltatauright|}{tau_c}, &left|deltatauright| le tau_c(1+frac{tau_c}{T_i}) \
    -frac{tau_c}{T_i}, &left|deltatauright| gt tau_c(1+frac{tau_c}{T_i}) \
    end{cases}
    end{align}
    $$

    which represents a simple triangular shape.
    There is a conditional statement. My implementation uses a for loop as follows:



    def waf_delay(delay_increment):
    for d in delay_increment:
    if np.abs(d) <= delay_chip*(1+delay_chip/integration_time):
    yield 1 - np.abs(d)/delay_chip
    else:
    yield -delay_chip/integration_time;

    integration_time = 1e-3 # seconds
    delay_chip = 1/1.023e6 # seconds

    x=np.arange(-5.0, 5.0, 0.1)
    y=list(waf_delay(x))
    plt.plot(x, y)
    plt.show()


    Is there a more correct way to transform an array based on a condition rather than just looping through it? Instead of having something like this:




    def f(x_array):
    for x in x_array:
    if np.abs(x) <= 3:
    yield 1 - x/3
    else:
    yield 0

    x=np.arange(-5.0, 5.0, 0.1)
    y=list(f(x))
    plt.plot(x, y)
    plt.show()



    I would like to write something like this:




    def f(x):
    if np.abs(x) <= 3:
    yield 1 - x/3
    else:
    yield 0


    x=np.arange(-5.0, 5.0, 0.1)
    plt.plot(x, f(x))
    plt.show()



    that could take an array.










    share|improve this question











    $endgroup$















      0












      0








      0





      $begingroup$


      I would like to plot the following function:



      $$
      begin{align}
      Lambda(deltatau) &equiv chi(deltatau, 0)
      = frac{1}{T_i} int_0^{T_i} a(t_0+t')a(t_0+t'+deltatau) dt' \
      &= begin{cases}
      1 - frac{left|deltatauright|}{tau_c}, &left|deltatauright| le tau_c(1+frac{tau_c}{T_i}) \
      -frac{tau_c}{T_i}, &left|deltatauright| gt tau_c(1+frac{tau_c}{T_i}) \
      end{cases}
      end{align}
      $$

      which represents a simple triangular shape.
      There is a conditional statement. My implementation uses a for loop as follows:



      def waf_delay(delay_increment):
      for d in delay_increment:
      if np.abs(d) <= delay_chip*(1+delay_chip/integration_time):
      yield 1 - np.abs(d)/delay_chip
      else:
      yield -delay_chip/integration_time;

      integration_time = 1e-3 # seconds
      delay_chip = 1/1.023e6 # seconds

      x=np.arange(-5.0, 5.0, 0.1)
      y=list(waf_delay(x))
      plt.plot(x, y)
      plt.show()


      Is there a more correct way to transform an array based on a condition rather than just looping through it? Instead of having something like this:




      def f(x_array):
      for x in x_array:
      if np.abs(x) <= 3:
      yield 1 - x/3
      else:
      yield 0

      x=np.arange(-5.0, 5.0, 0.1)
      y=list(f(x))
      plt.plot(x, y)
      plt.show()



      I would like to write something like this:




      def f(x):
      if np.abs(x) <= 3:
      yield 1 - x/3
      else:
      yield 0


      x=np.arange(-5.0, 5.0, 0.1)
      plt.plot(x, f(x))
      plt.show()



      that could take an array.










      share|improve this question











      $endgroup$




      I would like to plot the following function:



      $$
      begin{align}
      Lambda(deltatau) &equiv chi(deltatau, 0)
      = frac{1}{T_i} int_0^{T_i} a(t_0+t')a(t_0+t'+deltatau) dt' \
      &= begin{cases}
      1 - frac{left|deltatauright|}{tau_c}, &left|deltatauright| le tau_c(1+frac{tau_c}{T_i}) \
      -frac{tau_c}{T_i}, &left|deltatauright| gt tau_c(1+frac{tau_c}{T_i}) \
      end{cases}
      end{align}
      $$

      which represents a simple triangular shape.
      There is a conditional statement. My implementation uses a for loop as follows:



      def waf_delay(delay_increment):
      for d in delay_increment:
      if np.abs(d) <= delay_chip*(1+delay_chip/integration_time):
      yield 1 - np.abs(d)/delay_chip
      else:
      yield -delay_chip/integration_time;

      integration_time = 1e-3 # seconds
      delay_chip = 1/1.023e6 # seconds

      x=np.arange(-5.0, 5.0, 0.1)
      y=list(waf_delay(x))
      plt.plot(x, y)
      plt.show()


      Is there a more correct way to transform an array based on a condition rather than just looping through it? Instead of having something like this:




      def f(x_array):
      for x in x_array:
      if np.abs(x) <= 3:
      yield 1 - x/3
      else:
      yield 0

      x=np.arange(-5.0, 5.0, 0.1)
      y=list(f(x))
      plt.plot(x, y)
      plt.show()



      I would like to write something like this:




      def f(x):
      if np.abs(x) <= 3:
      yield 1 - x/3
      else:
      yield 0


      x=np.arange(-5.0, 5.0, 0.1)
      plt.plot(x, f(x))
      plt.show()



      that could take an array.







      python numpy matplotlib






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited 17 mins ago









      200_success

      129k15152415




      129k15152415










      asked 45 mins ago









      WooWapDaBugWooWapDaBug

      365314




      365314






















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