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    "# Practice Problems\n",
    "### Lecture 13\n",
    "\n",
    "Answer each number in a separate cell\n",
    "\n",
    "Rename this notebook with your last name and the lecture \n",
    "\n",
    "    ex. Cych_B_13\n",
    "\n",
    "Turn this in with Canvas"
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    "## 1. Matplotlib.pyplot\n",
    "- Use **open(file).readlines()** to peek at the data in the file:\n",
    "    \"Datasets/Tides/SDtides.csv\"\n",
    "- import the data into a pandas DataFrame\n",
    "    - the data file contains information about High and Low Tides predicted for  SIO (in 2017).  For up to date charts, go to: [https://tidesandcurrents.noaa.gov/noaatideannual.html?id=9410170](https://tidesandcurrents.noaa.gov/noaatideannual.html?id=9410170)\n",
    "- plot a line chart of high tide (cm) for the first 60 days of the year \n",
    "    - include a title, x-axis label, and y-axis label\n",
    "- add a line chart of low tide (cm) to the same plot\n",
    "- include a legend in your figure\n",
    "\n",
    "\n",
    "## 2. Matplotlib.pyplot.figure.add_subplot( )\n",
    "- Use **fig.add_subplot( )** to plot High tide (cm) for the first 60 days and Low tide (cm) for the first 60 days in two subplots that are side-by-side.\n",
    "- Add a title, y label, and x label to each figure\n",
    "\n",
    "\n",
    "## 3. Bar charts\n",
    "- use **plt.bar( )** to plot the height at low tide for the first 60 days of the year\n",
    "- include a title, x-axis label, y-axis label\n",
    "\n",
    "## 4. Exceptions\n",
    "- write a regular function that takes a single parameter and squares it\n",
    "- write a **for** loop that squares all the values in this list:\n",
    "        values = [ 0., 11., 2, 22., 's',  33., 'c',  44.,   55.,   66., 'a',  77.,   88., 99.,  110.,  121., 'w']\n",
    "\n",
    "- Use the error message to learn what type of error is thrown when the program encounters a string instead of an integer.\n",
    "- Include a **try-except** statement that catches this type of error and prints out the offending values"
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