#!/usr/bin/env python
# coding: utf-8

# In[1]:


get_ipython().run_line_magic('matplotlib', 'inline')
import pandas as pd


# In[2]:


url='https://raw.githubusercontent.com/zdefne-usgs/Moody-Tidal-Atlas/master/table7_S2.csv'
df = pd.read_csv(url,skiprows=7)


# In[3]:


df = df.fillna('')


# In[4]:


pd.isnull(df.iloc[:,0])


# In[5]:


ind = df.iloc[:,0].str.contains(' N')


# In[6]:


df.iloc[:,0][ind]


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# In[7]:


df.iloc[:,0][ind]


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