小编Bil*_*lla的帖子

我用头文件TinyGPSPlus在Arduino uno中编写了以下代码,并使用了GPS SKG 13BL(GPS模块).

#include <TinyGPS++.h>
#include <SoftwareSerial.h>
  /*
    This program sketch obtain and print the lati,logi,speed,date and time
    It requires the use of SoftwareSerial, and assumes that you have a
    9600-baud serial GPS device hooked up on pins 4(rx) and 3(tx).
   */
static const int RXPin = 4, TXPin = 3;
static const uint32_t GPSBaud = 9600;

   // The TinyGPS++ object
TinyGPSPlus gps;

   // The serial connection to the GPS device
SoftwareSerial ss(RXPin, TXPin);

void setup()
    {
     Serial.begin(9600);
     ss.begin(GPSBaud); …

实际上，我们不能在if语句中使用tf.var作为布尔值，而不是使用tf.cond。我为规范化的输入数据编写此代码，并得到令人困惑的错误，我在哪里做错了？

   def global_contrast_normalize(X, scale=1., subtract_mean=True,use_std=False,
       sqrt_bias=0., min_divisor=1e-8):
       mean=tf.reduce_mean(X,axis=1)
       if subtract_mean:
         X = X - mean[:, numpy.newaxis]  # Makes a copy.
      else:
         X = tf.copy.copy(X)
      if X.get_shape()[1]==1:
        #ddof = 0
        mean, var = tf.nn.moments(X, axes=[1])

        normalizers = tf.sqrt(sqrt_bias + var) / scale

      else:
        normalizers = tf.sqrt(sqrt_bias + tf.reduce_sum((X ** 2),axis=1)) / scale
        Normalizers= tf.Variable(normalizers,'float32')
        M=tf.Variable(min_divisor,'float32')

      tf.cond( tf.less_equal(Normalizers,M),lambda:tf.assign(Normalizers,  [1]),lambda:tf.assign(Normalizers,normalizers))
      X /= Normalizers[:, tf.newaxis]  # Does not make a copy.
      return X

错误：

在_call_cpp_shape_fn_impl中引发ValueError（err.message）

ValueError：形状必须为等级0，但对于输入形状为[1]，[1]的“ cond_11 / Switch”（op：“ Switch”），等级为1。