Merge pull request #444 from Neuroblox/spDCM-tutorial-patch

Update spectralDCM.jl

docs/src/tutorials/spectralDCM.jl

@@ -1,8 +1,5 @@
 # # Spectral Dynamic Causal Modeling Tutorial
 # # Introduction
-# <table style="width:100%">
-# <tr>
-# <td style="width:60%">
 #
 # In this tutorial we will introduce how to perform a spectral Dynamic Causal Modeling analysis on simulated data [1,2].
 # To do so we roughly resemble the procedure in the [SPM12](https://www.fil.ion.ucl.ac.uk/spm/software/spm12/) script `DEM_demo_induced_fMRI.m` in [Neuroblox](https://www.neuroblox.org/).
@@ -12,23 +9,15 @@
 # We will model fMRI data by a balloon model and BOLD signal on top.
 # After simulation of this simple model we will use spectral Dynamic Causal Modeling to infer some of the model parameters from the simulation time series.
 # 
+# ![Workflow illustration](./docs/src/assets/spectral_DCM_illustration.png)
+# 
 # A brief outline of the procedure we will pursue:
 # - define the graph, add blocks -> section A, B and C in the figure
 # - simulate the model -> instead we could also use actual data, section D in figure
 # - compute the cross spectral density 
 # - setup the DCM
 # - estimate parameters
 # - plot the results
-#
-# </td>
-# <td>
-#
-# <img src="./docs/src/assets/spectral_DCM_illustration.png" width="350" height="470" />
-#
-#
-# </td>
-# </tr>
-# </table>
 
 using Neuroblox
 using LinearAlgebra