## How do you plot a log scale on the y-axis in MATLAB?

Create a log-linear plot of y. If you specify y as a matrix, the columns of y are plotted against the values 1:size(y,1) . For example, define y as a 5-by-3 matrix and pass it to the semilogy function. The resulting plot contains 3 lines, each of which has x-coordinates that range from 1 to 5 .

### How do you do log 10 in MATLAB?

Y = log10( X ) returns the common logarithm of each element in array X . The function accepts both real and complex inputs. For real values of X in the interval (0, Inf ), log10 returns real values in the interval ( -Inf , Inf ). For complex and negative real values of X , the log10 function returns complex values.

**How do you change the log scale?**

Select the “Scale” tab on the Format Axis window. Click the “Logarithmic Scale” check box near the bottom of the window. This changes the chart’s axis to a log scale.

**How do you convert data to log scale?**

To transform your data to logs: Click the Analyze button, choose built-in analyses, and then select Transforms from the list of data manipulations. Choose X = log(X). Also check the box at the bottom of the dialog to Create a New Graph of the results.

## Is a logarithmic scale exponential?

Logarithmic graphs use logarithmic scales, in which the values differ exponentially. For example, instead of including marks at 0,1,2 0 , 1 , 2 and 3 , a logarithmic scale may include marks at 0.1,1,10 0.1 , 1 , 10 and 100 , each an equal distance from the previous and next.

### Why do we use log-log plots?

Log-log plots are widely used to represent data that are expected to be scale-invariant (or “fractal”) – because fractal data usually follow a power law.

**Is log always base 10?**

The Common and Natural Logarithms. A logarithm can have any positive value as its base, but two log bases are more useful than the others. The base-10, or “common”, log is popular for historical reasons, and is usually written as “log(x)”.