我的具体问题是我似乎无法将我的数据转换为浮点数。我有数据,只是想使用我的模型方程拟合一条稳健的曲线:
y = a * e ^(-b * z)
这本菜谱是我的参考书:click
以下是我的尝试。我得到这个:
TypeError:“无法理解数据类型”
我相信这是因为我的列是字符串,所以我尝试了pd.Series.astype()
。
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
from scipy.optimize import least_squares
for i in range(1):
def model(z, a, b):
y = a * np.exp(-b * z)
return y
data = pd.read_excel('{}.xlsx'.format(600+i), names = ['EdGnd','380','395','412','443','465','490','510','520','532','555','560','565','589','625','665','670','683','694','710','Temp','z','EdZTemp','Tilt','Roll','EdZVin'])
data.dropna(axis = 0, how = 'any')
data.astype('float')
np.dtype(data)
data.plot.scatter('z','380')
def fun(x, z, y):
return x[0] * np.exp(-x[1] * z) - y
x0 = np.ones(3)
rbst1 = least_squares(fun, x0, loss='soft_l1', f_scale=0.1, args=('z', 'ed380'))
y_robust = model('z', *rbst1.x)
plt.plot('z', y_robust, label='robust lsq')
plt.xlabel('$z$')
plt.ylabel('$Ed$')
plt.legend();
答案 0 :(得分:1)
我认为问题在于您在apply plugin: 'com.android.application'
android {
compileSdkVersion 28
buildToolsVersion '28.0.3'
final def config = defaultConfig {
applicationId "com.suddenlink.suddenlink2go.uat"
minSdkVersion 14
targetSdkVersion 28
versionCode 20200
versionName "2.2.0-RC"
}
config
buildTypes {
release {
signingConfig null
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_7
targetCompatibility JavaVersion.VERSION_1_7
}
lintOptions {
checkReleaseBuilds false
// Or, if you prefer, you can continue to check for errors in release builds,
// but continue the build even when errors are found:
abortOnError false
}
packagingOptions {
exclude 'META-INF/DEPENDENCIES'
exclude 'META-INF/LICENSE'
exclude 'META-INF/LICENSE.txt'
exclude 'META-INF/license.txt'
exclude 'META-INF/NOTICE'
exclude 'META-INF/NOTICE.txt'
exclude 'META-INF/notice.txt'
exclude 'META-INF/ASL2.0'
}
useLibrary 'org.apache.http.legacy'
}
dependencies {
implementation(project(':androidpdfview')) {
exclude group: 'com.android.support', module: 'support-v4'
}
implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation project(':anvatoandroidsdkcore')
implementation 'com.android.support:appcompat-v7:21.0.3'
implementation 'com.google.android.gms:play-services:6.5.87'
implementation 'com.android.volley:volley:1.1.1'
implementation 'com.google.code.gson:gson:2.8.2'
implementation files('libs/commons-logging-1.1.2.jar')
}
中传递了'z'
,这是一个字符串,因此不能在乘法中使用。
下面是一些使用curve_fit的代码,该代码使用了args
,但使用起来可能会更容易一些:
least_squares
这将绘图
您可以尝试根据需要调整此代码。
如果要使用import matplotlib.pyplot as plt
import numpy as np
from scipy.optimize import curve_fit
# your model definition
def model(z, a, b):
return a * np.exp(-b * z)
# your input data
x = np.array([20, 30, 40, 50, 60])
y = np.array([5.4, 4.0, 3.0, 2.2, 1.6])
# do the fit with some initial values
popt, pcov = curve_fit(model, x, y, p0=(5, 0.1))
# prepare some data for a plot
xx = np.linspace(20, 60, 1000)
yy = model(xx, *popt)
plt.plot(x, y, 'o', xx, yy)
plt.title('Exponential Fit')
plt.show()
,可以使用:
f_scale
请参见documentation:
小矮人
将关键字参数传递给method ='lm'或minimum_squares的minimumsq。
如果您遇到未解决的问题,则默认使用popt, pcov = curve_fit(model, x, y, p0=(5, 0.1), method='trf', f_scale=0.1)
,它使用method='lm'
而不接受leastsq
作为关键字。因此,我们可以使用f_scale
,然后使用method='trf'
接受least_squares
。