In Matlab Code: heightconvert

Consider a cell of strings containing gender and height information of some patients $($but the data is a little bit messy$).$ Gender is given as $\text{'}$f$\text{'},$'female',$\text{'}$m$\text{'}$ or 'male' and heights are given in feet or centimeter $($some data point are missing$).$ For example

$\{\text{'}$f$\text{'}\text{'}$m$\text{'}\text{'}$f$\text{'}$ 'female' 'male'; $\text{'}5\mathrm{.}9\text{'}\text{'}6\text{'}\text{'}172\text{'}\text{'}\text{'}\text{'}180\text{'}\}$;

Write a function m$=$heightconvert$($data$)$ to convert the cell array data to a matrix of double m$.$ Use $0$ to represent female, $1$ to represent male. And convert height into meters and represent any missing data points as NaN. Assume that any height value that is less than $10$ is in feet and you need the convert those values to meters using $1$ foot $=0\mathrm{.}3048$ meter. Use str$2$double$()$ function to convert a string to a number.

$>>$ data$=\{\text{'}$f$\text{'}\text{'}$m$\text{'}\text{'}$f$\text{'}$ 'female' 'male'; $\text{'}5\mathrm{.}9\text{'}\text{'}6\text{'}\text{'}172\text{'}\text{'}\text{'}\text{'}180\text{'}\}$; $>>$ heightconvert$($data$)$ ans $=01\mathrm{.}0000001\mathrm{.}00001\mathrm{.}79831\mathrm{.}82881\mathrm{.}7200$ NaN $1\mathrm{.}8000$

Pseudocode

You can solve this problem with or without for loops. The following pseudocode describes a solution using for loops:

Initialize m to be a matrix of zeros. Let's process first row of data. For each column of data, Let v be the element on the first row of that column. If v is $\text{'}$m$\text{'}$ or 'male', store a $1$ in the corresponding location of m$.$ Now let's process second row of data. For each column of data, Let v be the element on the second row of that column. Use str$2$double$()$ to convert the string v into a numeric value. If the number is less than $10,$ convert feet into meters. Otherwise, convert centimeters to meters. Store the value in the corresponding location of m$.$

In the first for loop, you don't really need to check for $\text{'}$f$\text{'}$ or 'female', because m already contains zeros. You only need to find $\text{'}$m$\text{'}$ or 'male' and change those to $1.$

When checking whether a string v is $\text{'}$m$\text{'}$ or 'male', you should not really use the $\text{'}==\text{'}$ operator. For example, the expression v$==$'male' will raise an error when v contains 'female', because you'd be comparing vectors of different lengths. Instead of the $\text{'}==\text{'}$ operator, you need to use the strcmp$($a$,$b$)$ function, which will perform length$-$checks for you and will return a true only when a and b are of the same lengths and all of their characters are the same. So$,$ strcmp$($v$,\text{'}$m$\text{'})$ will tell you whether v is exactly $\text{'}$m$\text{'}$; and strcmp$($v$,$'male'$)$ will tell you whether v is exactly 'male'.